Public bug reported:
Binary package hint: linux-source-2.6.20
Installed ubuntu on gateway mt6452 laptop.
Kernel version linux-image-2.6.20-15-generic.
Sound worked fine.
Performed update which got new linux-image-2.6.20-16-generic from the security
archive.
Sound stopped working -- my programs still saw the sound device and would get
valid data back from the audio device, but no sound plays from the speakers or
line out.
Reverted to linux-image-2.6.20-15-generic, audio works again.
Output from lspci -vv:
00:14.2 Audio device: ATI Technologies Inc SB450 HDA Audio (rev 01)
Subsystem: ATI Technologies Inc SB450 HDA Audio
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 64, Cache Line Size: 32 bytes
Interrupt: pin ? routed to IRQ 17
Region 0: Memory at c0000000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA
PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0
Enable-
Address: 0000000000000000 Data: 0000
In /var/log/messages under the -16 kernel:
hda_codec: invalid dep_range_val 0:7fff
last message repeated 63 times
with many identical entries (e.g. last message repeated 98 times).
also other errors such as
[ 53.904000] hda_codec: num_steps = 0 for NID=0x3
[ 253.940000] hda_codec: num_steps = 0 for NID=0x3
[ 260.576000] hda-intel: Invalid position buffer, using LPIB read method
instead.
[ 571.392000] hda_codec: num_steps = 0 for NID=0x3
This bug may or may not be related to
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/117035
** Affects: linux-source-2.6.20 (Ubuntu)
Importance: Undecided
Status: New
--
Sound doesn't work on ATI SB450 HDA Audio using 2.6.20-16 kernel (but 2.6.20-15
works fine)
https://bugs.launchpad.net/bugs/136308
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