Hi,
I own an Asus U6V notebook, and the snd-hda-intel driver basically broke down, somewhere around 2.6.28 kernel release.
The symptoms are: very limited mixer controls, dysfunctional fn+key volume and mute control.
I bisected the problem down basically to this patch, commited between 2.6.27 and
2.6.28:
commit f1d4e28b2dbd35191cc5097b716ec7fa49540b0b
Author: Kailang Yang<kailang@xxxxxxxxxxx>
Date: Tue Aug 26 14:03:29 2008 +0200
ALSA: hda - Add more ALC662/663 codec support
- Add support for ECS (1019:9087)
- Delete G71V record from alc662_cfg_tbl[]
The PCI SubsystemID was the same with M70V
- Add more ASUS notebook support
My card is an Asustek (0x1043,0x19b3). I'm guessing this patch probably adds support for this exact PCI device and makes the driver stop using the fallback ACL662_AUTO detection.
This totally breaks all controls. The only ones remaining are master, mic, and two unrelated controls, cannot be controlled with function keys, and don't work very well either.
I can override this behaviour with modprobe option model=auto, which reverts to the previous behaviour.... almost.
Almost because this is not exactly identical to the previous behaviour, the buttons work a bit differently (although I'm not complaining as long as it works at all).
Mute only mutes "Front" and "Headphones", although it did mute "Master" as well. Same for volume controls which also only control "front", rather than the controls it used to.
Somewhere in the same release (2.6.28) the autodetection function must've changed as well, changing the behaviour.
To avoid the day when i wake up, upgrade my kernel, and hear no sound at all again, I'd like to provide some more information for the proper support to be added, or generate a patch, but I'm not currently sure what can I do, because experimenting with using different models did not really lead anywhere yet.
So, can anyone give me any hint about what to try, what to check and what information needs to be provided?
Zdenek
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