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Perfect Gentleman
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PostPosted: Thu Mar 29, 2018 5:30 am    Post subject: [Solved] KDE & Qt applications do not print. Reply with quote

Qpdfview shows warning
Quote:
Could not print ${name}.pdf
.
Code:
lp ${name}.pdf
works.
Zathura with Poppler backend prints too as well as Chromium.
wtf?


Last edited by Perfect Gentleman on Thu Apr 05, 2018 4:00 pm; edited 3 times in total
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Perfect Gentleman
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PostPosted: Thu Apr 05, 2018 9:47 am    Post subject: Reply with quote

Code:
$ okular --print HEAD_TYROLIA_Template__92.pdf
/usr/bin/lpr: No such file or directory

Code:
$ equery b /usr/bin/lpr
 * Searching for /usr/bin/lpr ...
net-print/cups-2.2.7 (/usr/bin/lpr)

Code:
$ whereis lpr                                                                               
lpr: /usr/bin/lpr /usr/share/man/man1/lpr.1.bz2

Code:
 $ lpstat -t
scheduler is running
system default destination: Samsung_M2070_Series
device for Samsung_M2070_Series: ipp://192.168.100.12:631/printers/Samsung_M2070_Series
Samsung_M2070_Series accepting requests since Thu 05 Apr 2018 04:43:46 PM +07
printer Samsung_M2070_Series is idle.  enabled since Thu 05 Apr 2018 04:43:46 PM +07


WTF?
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Perfect Gentleman
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PostPosted: Thu Apr 05, 2018 9:53 am    Post subject: Reply with quote

try to print from gwenview
Code:
 $ gwenview
QPainter::begin(): Returned false
QPainter::viewport: Painter not active
alignment= 132
QPainter::setViewport: Painter not active
QPainter::setWindow: Painter not active


from kolourpaint
Code:
$ kolourpaint
kf5.kio.core: KSambaShare: Could not find smb.conf!                                                                                                         
QPainter::begin(): Returned false                                                                                                                           
QPainter::end: Painter not active, aborted
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asturm
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PostPosted: Thu Apr 05, 2018 12:12 pm    Post subject: Reply with quote

USE=cups is enabled system-wide?
_________________
backend.cpp:92:2: warning: #warning TODO - this error message is about as useful as a cooling unit in the arctic
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Perfect Gentleman
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PostPosted: Thu Apr 05, 2018 1:36 pm    Post subject: Reply with quote

of course
Code:
~ $ eix --installed-without-use cups
No matches found

as I said above printing from other applications works.
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mike155
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PostPosted: Thu Apr 05, 2018 2:01 pm    Post subject: Reply with quote

Quote:
$ okular --print HEAD_TYROLIA_Template__92.pdf
/usr/bin/lpr: No such file or directory

Please run
Code:
strace -o /tmp/log -f okular --print HEAD_TYROLIA_Template__92.pdf
grep lpr /tmp/log

and post the output of the grep statement (approx. 30 lines)
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Perfect Gentleman
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PostPosted: Thu Apr 05, 2018 2:18 pm    Post subject: Reply with quote

Code:
$ grep lpr /tmp/log
22052 statx(AT_FDCWD, "/usr/x86_64-pc-linux-gnu/gcc-bin/7.3.0/lpr-cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/lib/llvm/6/bin/lpr-cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/local/bin/lpr-cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/bin/lpr-cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/bin/lpr-cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/opt/bin/lpr-cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/x86_64-pc-linux-gnu/gcc-bin/7.3.0/lpr.cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/lib/llvm/6/bin/lpr.cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/local/bin/lpr.cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/bin/lpr.cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/bin/lpr.cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/opt/bin/lpr.cups", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/x86_64-pc-linux-gnu/gcc-bin/7.3.0/lpr", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/lib/llvm/6/bin/lpr", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/local/bin/lpr", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239cbf0) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/bin/lpr", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0755, stx_size=14448, ...}) = 0
22052 access("/usr/bin/lpr", X_OK)      = 0
22052 statx(AT_FDCWD, "/usr/x86_64-pc-linux-gnu/gcc-bin/7.3.0/lpr", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239ca50) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/lib/llvm/6/bin/lpr", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239ca50) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/local/bin/lpr", AT_STATX_SYNC_AS_STAT, STATX_ALL, 0x7fff2239ca50) = -1 ENOENT (No such file or directory)
22052 statx(AT_FDCWD, "/usr/bin/lpr", AT_STATX_SYNC_AS_STAT, STATX_ALL, {stx_mask=STATX_ALL, stx_attributes=0, stx_mode=S_IFREG|0755, stx_size=14448, ...}) = 0
22052 access("/usr/bin/lpr", X_OK)      = 0
22068 execve("/usr/bin/lpr", ["/usr/bin/lpr", "-P", "", "-#1", "-J", "Pro/ENGINEER - PAPIERBOHRLEHRE", "-r", "/tmp/okular_BMvshN.ps"], 0x7fff2239d858 /* 62 vars */ <unfinished ...>
22068 write(2, "/usr/bin/lpr: No such file or di"..., 40) = 40
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mike155
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PostPosted: Thu Apr 05, 2018 2:49 pm    Post subject: Reply with quote

Thanks for the output. That looks pretty good - with the exception of the last two lines.

Look at the second last line. Okular uses '/usr/bin/lpr' to print a file - and that's perfectly fine. But the second argument is empty - and that's the problem. The argument should contain the printer name - but it doesn't. As a result, /usr/bin/lpr fails. The error message given by okular is wrong, of course. It should be 'lpr: The printer or class does not exist' - and not: '/usr/bin/lpr: No such file or directory'. That's probably a bug in Okular, but it's not the cause of your problem.

Let's try to find out why Okular uses an empty printer name when it calls lpr.
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Perfect Gentleman
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PostPosted: Thu Apr 05, 2018 2:55 pm    Post subject: Reply with quote

imo, it's problem with Qt as Qt applications as well KDE applications can not print.
Code:
$ strace -o /tmp/log_gwen -f  gwenview 0000
QPainter::begin(): Returned false
QPainter::viewport: Painter not active
alignment= 132
QPainter::setViewport: Painter not active
QPainter::setWindow: Painter not active


grep print /tmp/log_gwen
Code:
~ $ grep lp /tmp/log_gwen
28790 read(11, "[Protocol]\nhelper=true\nexec=\npro"..., 16384) = 3056
28790 read(18, "DRIVER=lpc_ich\nPCI_CLASS=60100\nP"..., 4096) = 162
28790 read(18, "DRIVER=lpc_ich\nPCI_CLASS=60100\nP"..., 4096) = 162
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 read(22, "[Dolphin]\nTimestamp=2018,1,7,22,"..., 16384) = 59
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)


Code:
~ $ grep cups /tmp/log_gwen
28790 lstat("/usr/lib64/qt5/plugins/printsupport/libcupsprintersupport.so", {st_mode=S_IFREG|0755, st_size=72744, ...}) = 0
28790 openat(AT_FDCWD, "/usr/lib64/qt5/plugins/printsupport/libcupsprintersupport.so", O_RDONLY|O_CLOEXEC) = 18
28790 openat(AT_FDCWD, "/usr/lib64/qt5/plugins/printsupport/libcupsprintersupport.so", O_RDONLY|O_CLOEXEC) = 18
28790 openat(AT_FDCWD, "/usr/lib64/libcups.so.2", O_RDONLY|O_CLOEXEC) = 18
28790 openat(AT_FDCWD, "/etc/cups/client.conf", O_RDONLY) = 18
28790 read(18, "ServerName /run/cups/cups.sock\n", 4096) = 31
28790 openat(AT_FDCWD, "/home/user_user/.cups/client.conf", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 connect(18, {sa_family=AF_UNIX, sun_path="/run/cups/cups.sock"}, 22) = 0
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 stat("/etc/cups/ppd/Samsung_M2070_Series.ppd", 0x7ffee57f2600) = -1 ENOENT (No such file or directory)
28790 connect(20, {sa_family=AF_UNIX, sun_path="/run/cups/cups.sock"}, 22) = 0
28790 access("/usr/share/locale/en_US/cups_en_US.po", F_OK) = -1 ENOENT (No such file or directory)
28790 access("/usr/share/locale/en/cups_en.po", F_OK) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/usr/share/locale/C/cups_C.po", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 stat("/etc/cups/ppd/Samsung_M2070_Series.ppd", 0x7ffee57f2620) = -1 ENOENT (No such file or directory)
28790 connect(20, {sa_family=AF_UNIX, sun_path="/run/cups/cups.sock"}, 22) = 0
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 stat("/etc/cups/ppd/Samsung_M2070_Series.ppd", 0x7ffee57f2660) = -1 ENOENT (No such file or directory)
28790 connect(22, {sa_family=AF_UNIX, sun_path="/run/cups/cups.sock"}, 22) = 0
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 stat("/etc/cups/ppd/Samsung_M2070_Series.ppd", 0x7ffee57f18a0) = -1 ENOENT (No such file or directory)
28790 connect(22, {sa_family=AF_UNIX, sun_path="/run/cups/cups.sock"}, 22) = 0
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 stat("/etc/cups/ppd/Samsung_M2070_Series.ppd", 0x7ffee57f1910) = -1 ENOENT (No such file or directory)
28790 connect(22, {sa_family=AF_UNIX, sun_path="/run/cups/cups.sock"}, 22) = 0
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 stat("/etc/cups/ppd/Samsung_M2070_Series.ppd", 0x7ffee57f1870) = -1 ENOENT (No such file or directory)
28790 connect(22, {sa_family=AF_UNIX, sun_path="/run/cups/cups.sock"}, 22) = 0
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 recvfrom(18, "lication/vnd.cups-paged-brf", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-paged-ubrl", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-pdf", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-pdf-banner", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-postscript", 31, 0, NULL, NULL) = 31
28790 recvfrom(18, "application/vnd.cups-ppd", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-raster", 27, 0, NULL, NULL) = 27
28790 recvfrom(18, "application/vnd.cups-raw", 24, 0, NULL, NULL) = 24
28790 recvfrom(18, "application/vnd.cups-ubrl", 25, 0, NULL, NULL) = 25
28790 recvfrom(18, "image/vnd.cups-brf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-pdf", 18, 0, NULL, NULL) = 18
28790 recvfrom(18, "image/vnd.cups-ubrl", 19, 0, NULL, NULL) = 19
28790 recvfrom(18, "cups-version", 12, 0, NULL, NULL) = 12
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 stat("/etc/cups/ppd/Samsung_M2070_Series.ppd", 0x7ffee57f1890) = -1 ENOENT (No such file or directory)
28790 connect(22, {sa_family=AF_UNIX, sun_path="/run/cups/cups.sock"}, 22) = 0
28790 openat(AT_FDCWD, "/etc/cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 openat(AT_FDCWD, "/home/user_user/.cups/lpoptions", O_RDONLY) = -1 ENOENT (No such file or directory)
28790 stat("/etc/cups/ppd/Samsung_M2070_Series.ppd", 0x7ffee57f18e0) = -1 ENOENT (No such file or directory)
28790 connect(22, {sa_family=AF_UNIX, sun_path="/run/cups/cups.sock"}, 22) = 0
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mike155
Guru
Guru


Joined: 17 Sep 2010
Posts: 452
Location: Frankfurt, Germany

PostPosted: Thu Apr 05, 2018 3:29 pm    Post subject: Reply with quote

Well, here is what happens:
  1. You start okular
  2. Okular reads a few local CUPS configuration files
  3. Okular connects to the CUPS server via TCP/IP and reads a list of available printers and their configuration
  4. Okular calls lpr to print a file and specifies an empty printer name

Your printing problem could be caused by:
  1. You have an invalid CUPS server configuration
  2. You have a valid, but highly unusable CUPS server configuration
  3. You have an error in your CUPS client configuration
  4. You have a valid, but highly unusable CUPS client configuration
  5. There's a bug in your CUPS software
  6. There's a bug in your Qt or KDE software

Most people don't have problems if they use KDE, Qt and CUPS to print their files. There must be a very specific problem with your local setup.
  1. Which versions of CUPS, Qt and KDE do you use? Do you use any non-standard flags or options to install these packages?
  2. Please look at the output of 'grep open /tmp/log'. It will show you some client CUPS configuration files (/etc/cups/client.conf, ~/.cups/lpoptions, etc). Please double-check their contents.
  3. Please look at the configuration files on your CUPS server. Is there anything that could confuse Qt/KDE?
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Perfect Gentleman
l33t
l33t


Joined: 18 May 2014
Posts: 693

PostPosted: Thu Apr 05, 2018 3:34 pm    Post subject: Reply with quote

1 - printing of test page from SystemSetting - ok
2 - printing from Libreoffice, Chromium, Zathura - ok
3 - another with the sane verions of KDE and Qt - ok
4 - printing from any Qt5/KDE app - not ok
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Perfect Gentleman
l33t
l33t


Joined: 18 May 2014
Posts: 693

PostPosted: Thu Apr 05, 2018 3:54 pm    Post subject: Reply with quote

solved
add
Code:
$ cat /etc/cups/client.conf
ServerName 192.168.100.102:631
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