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 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs