On Tue, Jul 20, 2010 at 2:55 AM, Ned Slider <ned at unixmail.co.uk> wrote: > On 20/07/10 03:08, Rob Kampen wrote: > >> Still no joy - I am at a loss to know what to check - if I boot a 194 >> kernel no sound, 164 kernel is fine - why the regression? >> Same configs, same modules loaded but now no sound - what can I check to >> determine problem and find a solution? >> no errors in logs or dmesg > > I would suggest you start checking back through the changelogs between > kernel-2.6.18-194.el5 and kernel-2.6.18-164.el5, find likely candidates > that may have caused your issue and then rebuild a testing kernel with > that patch reverted. If that testing kernel fixes your issue then you've > identified the issue and can file a bug report upstream. > > To start you on your way, this patch looks like a likely candidate for > you to investigate further: > > * Mon Dec 21 2009 Jarod Wilson <jarod at redhat.com> [2.6.18-183.el5] > - [sound] alsa hda driver update for rhel5.5 (Jaroslav Kysela) [525390] Rob, I understand you have already tried a workaround reported in: https://bugzilla.redhat.com/show_bug.cgi?id=586532 According to comment #10 in there, Gary Gatling built a test kernel with the above alsa patch removed. You might want to try asking him for the kernel he built if you do not feel like building it yourself. Akemi