Ubuntu EeePC-optimized Kernel

Alsamixer lacks several volume control channels

Reported by Hmpf on 2009-01-22
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Ubuntu EeePC Kernel
Undecided
Adam McDaniel

Bug Description

With the eee and eee-lean kernel version 2.6.27.8 there are only the channels PCM, LineOut, Capture and iSpeaker present in alsamixer and kmix. PCM controls the real headphone/lineout jack, while LineOut controls the real speakers. iSpeaker has no loudness control, only option with this one is mute or not. When muted in alsamixer the real speakers are muted.

So theret is no possiblity to control the global volume, only speakers and headphones seperately.

Using normal ubuntu kernels version 2.6.27.7 and 2.6.27.9 there are other channels (Master, Headphone, PCM, Front, Front Mic, Front Mic Boost, Capture, Input Source) present. I can't find a normal linux-image-2.6.27.8 ubuntu to see if it is the same with this too.

This occurs on a eee1000 with kubuntu 8.10, so no pulse-audio involved. Maybe it is related to bug #300474.

Adam McDaniel (adamrmcd) wrote :

I think you're right. Basically there is incomplete work in this version of Alsa to warrant full sound card support.

Upstream alsa may already have a fix for the problem... It may already be fixed in Jaunty

Changed in ubuntu-eeepc-kernel:
status: New → Confirmed
ewan colsell (ewanuno) wrote :

this also affects eeepc 901, ubuntu intrepid. with the kernel Linux 2.6.27-8-eeepc-lean.
it did not happen in the latest kernel for hardy.

also i can confirm that the volume is also lower

Adam McDaniel (adamrmcd) wrote :

OK, I wonder if there's an issue in your specific sound card, or maybe asus released some non-standard sound cards for some devices. For everyone encountering this problem, please cite your device and run the command:

  $ sudo lspci -v -nn | grep -A 7 Audio

Changed in ubuntu-eeepc-kernel:
assignee: nobody → adam.mcdaniel
Hmpf (dns-hmpf) wrote :

Eee 1000; I changed the 7 to 9 in the grep command to get the whole Audio-Block.

ewan colsell (ewanuno) wrote :

ewan@ewan-laptop:~$ sudo lspci -v -nn | grep -A 10 Audio
00:1b.0 Audio device [0403]: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller [8086:27d8] (rev 02)
 Subsystem: ASUSTeK Computer Inc. Device [1043:831a]
 Flags: bus master, fast devsel, latency 0, IRQ 16
 Memory at f7db8000 (64-bit, non-prefetchable) [size=16K]
 Capabilities: [50] Power Management version 2
 Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
 Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
 Capabilities: [100] Virtual Channel <?>
 Capabilities: [130] Root Complex Link <?>
 Kernel driver in use: HDA Intel

eeepc 901, ubuntu interpid
Linux 2.6.27-8-eeepc-lean

On an EeePC 901Go with kernel 2.6.27-13-eeepc:

00:1b.0 Audio device [0403]: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller [8086:27d8] (rev 02)
        Subsystem: ASUSTeK Computer Inc. Device [1043:831a]
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at f7eb8000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: [50] Power Management version 2
        Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
        Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
        Capabilities: [100] Virtual Channel <?>
        Capabilities: [130] Root Complex Link <?>
        Kernel driver in use: HDA Intel
        Kernel modules: snd-hda-intel

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