Bug 103624

Summary: Change compile-time option CONFIG_APM_RTS_IS_GMT to sysctl-tunable kernel parameter
Product: [Retired] Red Hat Linux Reporter: Otto J. Makela <om>
Component: kernelAssignee: Arjan van de Ven <arjanv>
Status: CLOSED WONTFIX QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 9CC: riel
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Target Release: ---   
Hardware: i386   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2004-09-30 15:41:30 UTC Type: ---
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Description Otto J. Makela 2003-09-03 10:07:29 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 Galeon/1.2.9 (X11; Linux i686; U;) Gecko/20030314

Description of problem:
The fact that CONFIG_APM_RTS_IS_GMT is a kernel compile-time flag instead of a
sysctl-tunable parameter (and companies like RedHat deliver kernels compiled
with this flag on) means that you have to recompile the kernel just to be able
to run Linux in environments where the RTC _cannot_ be set to GMT (like when
co-existing with Windows operating systems). Once set up, the kernel parameter
could be set according to /etc/sysconfig/clock setting at boot time, simplifying
life for all. A quick browse of the apm.c source code makes me think this change
would not really require major work, but of course I could be mistaken.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Run standard RedHat-distributed kernel on a laptop w/external display
2. Select "RTC is _not_ UTC" in installation
3. Switch displays via FN/F8 apm call

Actual Results:  The system clock was off by the amount of difference from UT,
in my case, three hours.

Expected Results:  Real time clock should not change when changing displays.

Additional info:

The problem can of course be circumvented by recompiling a new kernel with a
different CONFIG_APM_RTS_IS_GMT setting, but this seems like a rather heavy
solution for a annoyance-type problem.

Hardware Environment: Dell Latitude C600 laptop + external display


Comment 1 Bugzilla owner 2004-09-30 15:41:30 UTC
Thanks for the bug report. However, Red Hat no longer maintains this version of
the product. Please upgrade to the latest version and open a new bug if the problem

The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, 
and if you believe this bug is interesting to them, please report the problem in
the bug tracker at: http://bugzilla.fedora.us/