Red Hat Bugzilla – Bug 178645
ACPI events delayed; buffered?
Last modified: 2015-03-04 20:15:29 EST
Description of problem:
After upgrading the kernel (and other packages) of my FC4 installation, ACPI
events are no longer immediately coming through. They are delayed or "pushed
out" after new events are generated. It appears as if they are buffered.
Version-Release number of selected component (if applicable):
Since the acpid package hasn't been updated since the FC4 release (still
1.0.4-1), I assume it's a kernel problem.
Kernels I tried, that are showing this problem: version 2.6.14-1.1656,
2.6.15-1.1824_2+swsusp2, and 2.6.11-1.1369.
There was one kernel package that I was running that didn't have this problem. I
don't know it's exact version; I think it's release number was ending with ..44
Steps to Reproduce:
Generate ACPI events by pressing hotkeys. Then actions and logs in
/var/log/acpid are delayed.
I'm running FC4 on an Asus V6V notebook.
This problem appears to be caused by the infamous ACPI EC burst mode, being
enabled and disabled again in the kernel. Several others using Asus notebooks
were experiencing similar problems. I've set kernel parameter ec_burst=1, and
things seem to run without any problems now.
OK, as there isn't a lot i can do about this in userland and there is a know
workaround now i'm closing this bug.
Read ya, Phil