linux-kernel - hda_intel : Patch + Regression in 2.6.18 -> 2.6.22

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Date:	Wed, 22 Aug 2007 23:29:02 +0100
From:	Roger Gammans <roger@...puter-surgery.co.uk>
To:	linux-kernel@...r.kernel.org
Subject: hda_intel : Patch + Regression in 2.6.18 -> 2.6.22 

Hi

I'm fighting a problem with my (new) Acer laptop.  (Aspire 9303)

In 2.6.18 the audio worked fine, but now I've upgraded to 2.6.22
it has stopped working. 

I note that there is a acer specific quirk mode in patch_realtek.c
enabled for all acer devices introduced in the timeframe. Disabling
the quirk so that the driver uses it auot mode makes playback work
fine again.

To be clear this pathc seems to work for me:-

--- /usr/src/linux-source-2.6.22/sound/pci/hda/patch_realtek.c 2007-07-09 00:32:17.000000000 +0100
+++ linux-source-2.6.22/sound/pci/hda/patch_realtek.c   2007-08-20 22:21:37.000000000 +0100
@@ -6392,7 +6392,7 @@
        SND_PCI_QUIRK(0x1462, 0x4319, "MSI", ALC883_TARGA_DIG),
        SND_PCI_QUIRK(0x1462, 0x4324, "MSI", ALC883_TARGA_DIG),
        SND_PCI_QUIRK(0x1462, 0xa422, "MSI", ALC883_TARGA_2ch_DIG),
-       SND_PCI_QUIRK(0x1025, 0, "Acer laptop", ALC883_ACER),
+/*     SND_PCI_QUIRK(0x1025, 0, "Acer laptop", ALC883_ACER) , */
        SND_PCI_QUIRK(0x15d9, 0x8780, "Supermicro PDSBA", ALC883_3ST_6ch),
        SND_PCI_QUIRK(0x161f, 0x2054, "Medion laptop", ALC883_MEDION),
        SND_PCI_QUIRK(0x1071, 0x8258, "Evesham Voyaeger", ALC883_LAPTOP_EAPD), 


Unfortunately I think it's pretty clear it will break for others.

The lspci reports the following on the appropriate device:-
  00:10.1 0403: 10de:026c (rev a2)
        Subsystem: 1025:0112
        Flags: 66MHz, fast devsel, IRQ 19
        Memory at c0000000 (32-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>




TTFN
-- 
Roger. 	                        Home| http://www.sandman.uklinux.net/
Master of Peng Shui.      (Ancient oriental art of Penguin Arranging)
Work|Independent Sys Consultant | http://www.computer-surgery.co.uk/
 New key Fpr: 72AF 0ACC 9A53 E59F B1B6  DC14 1983 A13E 5C3D 3CEB 

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