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pangloss
n00b
Joined: 02 Aug 2002
Posts: 46
Location: Ithaca, NY
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 Posted: Sat Aug 24, 2002 4:34 am Post subject: amixer and alsamixer segfaults |
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AAAAAARRRRRGGGGGGGGGHHHHHHHHH!
I'm having a lot of trouble figuring this one out. I think I've totalled ~4hrs trying to get ALSA working on my laptop (a Fujitsu P2110)  I can get audio working with the sound driver built into the kernel, but I've since recompiled the kernel (2.4.19-gentoo-r7) with only soundcore as a module and no other sound drivers (and I removed the driver from modules.autoload).
Largely following the Desktop Guide, I emerged alsa-driver (0.9.0_rc2) and alsa-utils, editing /etc/modules.d/alsa for my system's soundcard, ran update-modules and rebooted. ALSA appears to come up fine. However, running amixer or alsamixer causes a segmentation fault.
I found the following related threads:
audigy and alsa -> amixer crashes
Alsa probs
Amixer segfault
but the problem in those cases appears to be that /dev/dsp and/or /dev/mixer were not created. I've got both files (and /dev/audio) which are links to the respective files in /dev/sound.
For reference:
/etc/modules.d/alsa
| Code: |
alias char-major-116 snd
alias char-major-14 soundcore
alias snd-card-0 snd-ali5451
alias sound-slot-0 snd-card-0
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
alias /dev/mixer snd-mixer-oss
alias /dev/dsp snd-pcm-oss
alias /dev/midi snd-seq-oss
options snd snd_cards_limit=1
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/etc/devfsd.conf
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...
LOOKUP snd MODLOAD ACTION snd
LOOKUP dsp MODLOAD
LOOKUP mixer MODLOAD
LOOKUP midi MODLOAD
REGISTER sound/.* PERMISSIONS root.audio 660
REGISTER snd/.* PERMISSIONS root.audio 660
...
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The strace is a little long, so I won't include it all unless someone thinks it'll help. Here are the last few lines:
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# strace amixer
...
access("/etc/asound.conf", R_OK) = -1 ENOENT (No such file or directory)
access("/root/.asoundrc", R_OK) = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC0", O_RDONLY) = 3
close(3) = 0
open("/dev/snd/controlC0", O_RDWR) = 3
ioctl(3, USBDEVFS_CONTROL, 0xbffff848) = 0
fcntl64(3, F_GETFL) = 0x2 (flags O_RDWR)
fcntl64(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
ioctl(3, USBDEVFS_RELEASEINTERFACE, 0xbffffa44) = 0
brk(0x805a000) = 0x805a000
ioctl(3, USBDEVFS_RELEASEINTERFACE, 0xbffffa44) = 0
brk(0x805b000) = 0x805b000
--- SIGSEGV (Segmentation fault) ---
+++ killed by SIGSEGV +++
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Any ideas? I'm so fried |
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[UK]Superdude
Tux's lil' helper
Joined: 22 Jul 2002
Posts: 149
Location: Adelaide, Australia
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| Posted: Sat Aug 24, 2002 5:58 am Post subject: |
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The only time Ive had amixer seg fault was when I forgot to compile devfs support into the kernel. Are you sure its in there? You have to have prompt for incomplete/dev turned on as well for the option to be there, but I may be wrong.
Ne way I have a feeling it may be a kernel compile issue |
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pangloss
n00b
Joined: 02 Aug 2002
Posts: 46
Location: Ithaca, NY
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| Posted: Sat Aug 24, 2002 10:42 am Post subject: |
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well here *was* the applicable part of my kernel config:
CONFIG_DEVFS_FS=y
#CONFIG_DEVFS_MOUNT is not set
#CONFIG_DEVFS_DEBUG is not set
so i just recompiled my kernel with
CONFIG_DEVFS_FS=y
CONFIG_DEVFS_MOUNT=y
#CONFIG_DEVFS_DEBUG is not set
unmerged and re-emerged alsa-driver and alsa-utils and i still get the same segfault
damn damn damn. |
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fics
n00b
Joined: 11 Aug 2002
Posts: 4
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| Posted: Sat Aug 24, 2002 1:52 pm Post subject: |
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I have the same problem, alsa stuff(amixer, alsa-xmms alsa-everythiing...) segfautls , atleast I can still play with OSS/free on my xmms...
I have sis7012 (using intel8x0 module) |
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