Bug 124820 - Development kernels are messing up sound after a laptop suspend
Development kernels are messing up sound after a laptop suspend
Status: CLOSED CURRENTRELEASE
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
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i386 Linux
medium Severity medium
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Assigned To: Dave Jones
Brian Brock
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Depends On:
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Reported: 2004-05-30 15:30 EDT by Michal Jaegermann
Modified: 2015-01-04 17:06 EST (History)
1 user (show)

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Fixed In Version: 2.6.12-1.1447_FC4
Doc Type: Bug Fix
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Last Closed: 2005-09-11 21:29:17 EDT
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Description Michal Jaegermann 2004-05-30 15:30:48 EDT
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.

How reproducible:
Always

Additional info:
This laptop "goes to work" and I will see it back approximate
in a month.
Comment 1 Dave Jones 2005-08-04 18:41:15 EDT
this bug is pretty old now, can you try again with current kernels ?
Comment 2 Michal Jaegermann 2005-09-11 21:29:17 EDT
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 :-).

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