Red Hat Bugzilla – Bug 124820
Development kernels are messing up sound after a laptop suspend
Last modified: 2015-01-04 17:06:36 EST
Description of problem:
Acer Travelmate 230 is doing a more or less correct suspend
provided acpi_sleep=s3_bios was used as a kernel parameter
AND ehci_hcd module unloaded before a sleep attempt.
The above works, up to extent, with this problem that attempts
to play sounds after a resume repeat in an infinite loop,
which can be broken with ^C, roughly the first second of a sound
to be played. This happens at least with 2.6.6-1.391,
2.6.6-1.394 and 2.6.6-1.397 kernels.
Unloading sound modules before sleeping and reloading them
after does not change the picture. An output of 'lscpi -vv'
before and after sleeping is the same.
The catch is that the sleep procedure described above works
also with 2.6.5-1.358 and then sound is not adversly affected.
One does not need to bother even with unloading sound modules.
This laptop "goes to work" and I will see it back approximate
in a month.
this bug is pretty old now, can you try again with current kernels ?
With 2.6.12-1.1447_FC4 kernel I do have a sound after a return from suspend
(but no video if acpi_sleep=s3_bios was skipped :-).