Bugzilla Bug 201271

Bug Report

Problem: No sound is played from the laptop's speakers.
Apparent Cause: Kernel Upgrade from gentoo-sources-2.6.22-r9 to
gentoo-sources-2.6.23-r3.
Reproducible on: gentoo-sources-2.6.23 gentoo-sources-2.6.23-r1
gentoo-sources-2.6.23-r2 gentoo-sources-2.6.23-r3 vanilla-sources-2.6.23.8.
Alsa Driver Version: 1.0.15.

System Details: 
    sys_vendor   = "TOSHIBA"
    sys_product  = "Satellite P100"
    sys_version  = "PSPA6E-01F015PT"
    bios_version = "V4.20"
        Phoenix Bios

Additional Notes: 
- I had experienced this very same problem with all kernels before
2.6.20/2.6.21 (not sure)
- Speakers worked perfectly under gentoo-sources-2.6.22*
- Sound Card seems to be working, because USB Headphones and Bluetooth Audio
Devices play sound, which leads me to exclude alsa issues.
- Built in Headphones Jack doesn't work too.
- No changes were made to the kernel's config.
- From googling around, I believe the problem resides in a bugged DSDT.
However, I am not qualified to make the necessary changes, and don't understand
why it didn't work at first, started working under 2.6.22 and stopped working
again with 2.6.23.

I tried to make this bug report as concise as I could. I am not a native
English speaker, so If you have any problems understanding something that I
wrote, or need any more information, please ask me and I will answer as soon as
I can.

Thank you, Luís Costa
luisfcosta@gmail.com

Reproducible: Always

Your USB headphones and bluetooth devices do not use the sound card. It sounds
like the sound card is not working under these kernels.

Please post output of "cat /proc/asound/cards" and attach dmesg from a working
2.6.22 kernel and a broken 2.6.23 kernel.

Created an attachment (id=137743) [details]
Kernel 2.6.22 info

Created an attachment (id=137745) [details]
Kernel 2.6.23 info

Thank you for the quick response. I have attached the info you requested. I had
never used bugzilla's attachments before. Should I use something else? 

What arguments to you pass to the kernel in grub.conf? For 2.6.22 kernels I use
acpi_osi=!Linux rather than editing the DSDT but this also stops working on
2.6.23-gentoo{,-r1,-r2,-r3}.

Jack, I don't pass any arguments at all with 2.6.22. It just worked. However, I
have tried adding "acpi_osi=!Linux" to the 2.6.23kernel (I read it somewhere,
but it still didn't work. Something must have changed in 2.6.23.

Just in case it helps complete the picture:

My Toshiba Satellite P100-j01 would have no sound on some 2.6 kernels unless I
replaced the DSDT, which I did until 2.6.22 when I discovered acpi_osi=!Linux.
If I did neither the sound wouldn't work at all. I've only tried
acpi_osi=!Linux on 2.6.23 (I can no longer find the patch for the 3.30 DSDT),
but no luck.

I have very limited understanding of what it needs to be done in order to
correctly patch a DSDT. That said, I tried fixing mine, at least the parts that
were supposedly connected to the sound card, but the probem still persists. It
is highly likely that I did something wrong, but the iasl compiler didn't
complain about any of the things I changed- just a few warnings. 

The thing that intrigues me here, is the fact that I didn't have to add
anything like "acpi_osi=!Linux" during the 2.6.22* series, which means that
somehow the kernel was able to bypass the bugged DSDT, or at least ignore it.
I'm keeping 2.6.22 for the time being, as sound is a major feature for me.

I have the same problem running 2.6.23-tuxonice-r4 on a Toshiba Satego P100-10F
(other name for Satellite). Interestingly, I already fixed my DSDT so that it
builds without errors _or_ warnings, and it still doesn't work. acpi=off
"fixes" it, but I kinda need my acpi :)

Still no progress regarding this matter? I am looking forward to going from
2.6.22 to 2.6.23.

boroshan on f.g.o has claimed that this is fixed on 2.6.24
(http://forums.gentoo.org/viewtopic.php?p=4795322). Can someone confirm? If
this is true, is it worth closing this bug?

Yes, I can confirm the bug has been fixed in kernel 2.6.24. I have the
alsa-drivers built in and I didn't need any DSDT patch.

Great great work :D!

Thanks for your testing efforts, everyone.

I'm closing this as we expect to be stabilizing the 2.6.24 version of
gentoo-sources sometime this week.