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Joined: 03 Jul 2005
Posts: 52
Location: Germany

PostPosted: Wed Oct 03, 2012 8:21 pm    Post subject: increased powerconsumption after removing display Reply with quote

Hi folks,

I've re-configured my laptop (Thinkpad T410s) the last few days where I also configured my laptop for multi-display use.
In doing so I found out that the powerconsumption of my laptop won't go back to a normal value of around 8-9W in idle
when I unplug the 2nd display.

Instead it is around 10-11W. Powertop doesn't give any information about a certain device or process which could probably
cause this increased powerconsumption.

In order to get back to a normal powerconsumption I have to suspend the system and wake it up again.
After that everything is back to normal.
So, my assumption is that something doesn't get suspended or turned off currectly after unplugging the display.
It also doesn't matter if I'm using the displayport or VGA, everything is the same.

What I want to know now is, if anyone has a similar problem or if anyone could tell me where I can look for
a solution. Or is it a known problem? I couldn't find anything in the internet so far.
I'm thankful for any help cause 2W more powerconsumption is a lot.

The problem in short:
normal state (only laptop display): 8-9W powerconsumption (OK)
multi-display (one display plugged in into either DP or VGA): 11-12W (OK)
unplugging the display results in: 10-11W (NOT OK, should be 8-9W again)

Assumption: something doesn't get suspended or turned off again (graphic driver issue?)

My System:
Intel Core i5 M 520 with integrated Graphic (GFX driver i915,=xf86-video-intel-2.20.7 with USE-Flags: dri glamor sna xvmc )
I'm also running tp_smapi and tlp
Kernel: 3.5.4-gentoo-sources (had the same problem with 3.2.11)

emerge --info:

Portage (default/linux/amd64/10.0/desktop, gcc-4.6.3, glibc-2.15-r2, 3.5.4-gentoo x86_64)
System uname: Linux-3.5.4-gentoo-x86_64-Intel-R-_Core-TM-_i5_CPU_M_520_@_2.40GHz-with-gentoo-2.1
Timestamp of tree: Tue, 02 Oct 2012 10:00:01 +0000
ccache version 3.1.7 [enabled]
app-shells/bash: 4.2_p37
dev-java/java-config: 2.1.11-r3
dev-lang/python: 2.7.3-r2, 3.2.3
dev-util/ccache: 3.1.7
dev-util/cmake: 2.8.9
dev-util/pkgconfig: 0.27.1
sys-apps/baselayout: 2.1-r1
sys-apps/openrc: 0.10.5
sys-apps/sandbox: 2.5
sys-devel/autoconf: 2.13, 2.68
sys-devel/automake: 1.9.6-r3, 1.11.6
sys-devel/binutils: 2.22-r1
sys-devel/gcc: 4.6.3
sys-devel/gcc-config: 1.7.3
sys-devel/libtool: 2.4-r1
sys-devel/make: 3.82-r3
sys-kernel/linux-headers: 3.4-r2 (virtual/os-headers)
sys-libs/glibc: 2.15-r2
Repositories: gentoo tlp sunrise lokal
CFLAGS="-march=corei7 -O2 -fomit-frame-pointer -pipe"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt /usr/share/openvpn/easy-rsa"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=corei7 -O2 -fomit-frame-pointer -pipe"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs ccache config-protect-if-modified distlocks ebuild-locks fixlafiles news parallel-fetch parse-eapi-ebuild-head protect-owned sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS="-O2 -pipe"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
LINGUAS="en de"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTDIR_OVERLAY="/var/lib/layman/tlp /var/lib/layman/sunrise /usr/local/portage"
USE="3dnow X a52 aac acl acpi alsa amd64 avahi berkdb bitmap-fonts branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cups cxx dbus dri dts dvd dvdr emboss encode exif ffmpeg flac fortran gdbm gif globalmenu gpm gstreamer gtk gtk3 iconv jpeg lcms libnotify mad mmx mng modules mp3 mp4 mpeg mudflap multilib nautilus ncurses networkmanager nls nptl nsplugin ntp nvidia ogg opengl openmp pam pango pcre pdf png policykit ppds pppd pulseaudio python readline sdl session smp spell sse sse2 ssl startup-notification stream svg systemd tcpd threads tiff truetype truetype-fonts type1-fonts udev udisks unicode upower usb vcd vorbis wxwidgets x264 xcb xinerama xml xulrunner xv xvid zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en de" PHP_TARGETS="php5-3" PYTHON_TARGETS="python3_2 python2_7" RUBY_TARGETS="ruby18 ruby19" USERLAND="GNU" VIDEO_CARDS="intel vesa" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"

If you need further information, plz let me know

so long
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