Bug 88322 - jerky execution of background program
jerky execution of background program
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
i386 Linux
medium Severity low
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Assigned To: Arjan van de Ven
Brian Brock
Depends On:
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Reported: 2003-04-08 18:11 EDT by Bob T.
Modified: 2007-04-18 12:52 EDT (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2004-09-30 11:40:46 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Bob T. 2003-04-08 18:11:48 EDT
From Bugzilla Helper:
User-Agent: Mozilla/4.79 [en] (X11; U; Linux 2.4.18-14 i686)

Description of problem:
I'm trying to run xhangglider as the "background program"
of the gdm login screen. This works fine on one box (a Duron)
but on an Athlon box the execution is slow and jerky, somewhat synchronized with
the pulsing of the cursor.  I can't figure out why.
Possibly some problem with the Athlon kernel I'm using 
(kernel-2.4.18-14.athlon.rpm) ?  It's definitely not because the program
requires too many cycles:  it runs standalone fine using just 1% of the CPU.

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

How reproducible:

Steps to Reproduce:
1. install xhangglider 
2. BackgroundProgram=/usr/local/bin/xhangglider -noflicker -pilot 8 in

Actual Results:  xhangglider program runs slowly and jerkily

Expected Results:  smooth and fast execution

Additional info:
Comment 1 Havoc Pennington 2003-04-08 18:28:24 EDT
If you can track this down more definitively to a Red Hat problem 
we can look at it, but we aren't likely to download xhangglider and try 
to debug that. Can you reproduce it with any Red Hat provided software?

Why is the cursor pulsing? Perhaps the problem is an interaction between OpenGL or 
other graphics and the software cursor. That would be an XFree86 issue.

In any case, it's more likely to be XFree86 or kernel than gdm.

Comment 2 Bob T. 2003-04-08 19:29:10 EDT
1.  xfishtank works fine as the background program
2.  It's the username/password cursor that pulses, not the "pointer" cursor;
    I presume this is deliberate. It's the same cursor pulsing that is
happening     in this browser window as I type.
3.  The same version of XFree86 is running on the Duron/Athlon boxen, but the
    video cards and hence drivers are different.
4.  The reason I was considering this to be a gdm problem is that xhangglider 
    runs fine as a user program.
Comment 3 Havoc Pennington 2003-07-30 17:30:07 EDT
Must just be an X/kernel scheduling issue, I can't see how gdm would 
cause it.

The errata kernel for RHL9 may be much better in this respect.
Comment 4 Bugzilla owner 2004-09-30 11:40:46 EDT
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/

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