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SubjectRe: CS423x audio driver updates for testing
On Thursday 15 November 2001 05:17, Alan Cox wrote:
> This gets rid of the nasty clicks on the thinkpad. On the TP600 this leaves
> us with fully functional sound including save/restore (if your bios is
> not too ancient at least). The mixer changes are from Daniel Cobra, I added
> the ident changes and made the driver pick the right (I hope) feature sets
> for each board.
> Can folks with cs42xx series audio give it a test make sure it doesn't
> break anything
> Alan

Well, it didn't break anything, but it didn't fix my no-sound after suspend

Without your patch, sound on my dell inspiron 3500 laptop works fine until
the first APM suspend and resume cycle, after which noatun under KDE will
block indefinitely trying to write sound and trying sound from the command
line (no X/KDE running) can get a little sound out sometimes, but it loops
endlessly with warnings printing to the console about an IRQ problem. To get
sound working again, I have to power the laptop off and back on.

I just applied the patch against 2.5.0 (with the
don't-eat-your-filesystem-on-shutdown patch as well: hey, it's 2.5, it's
supposed to do that, isn't it?) and it made no noticeable difference.

lspci produces the same output before and after APM suspend. It's a strange
chipset, but it's using the ad1848 sound driver:

lspci -s 01:00.1 -v -v

01:00.1 Multimedia audio controller: Neomagic Corporation [MagicMedia 256AV
Audio] (rev 12)
Subsystem: Dell Computer Corporation MagicMedia 256AV Audio Device on
Colorado Inspiron
Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B+
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Interrupt: pin B routed to IRQ 11
Region 0: Memory at fe000000 (32-bit, prefetchable) [size=4M]
Region 1: Memory at fe700000 (32-bit, non-prefetchable) [size=1M]
Capabilities: [dc] Power Management version 1
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
Status: D0 PME-Enable- DSel=0 DScale=0 PME-

Any clues?

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