Bug 209589 - modprobe mga causes kernel panic
modprobe mga causes kernel panic
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
i386 Linux
medium Severity urgent
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Assigned To: Brendan Mchugh
Brian Brock
Depends On:
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Reported: 2006-10-06 03:44 EDT by Brendan Mchugh
Modified: 2012-06-20 12:09 EDT (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2012-06-20 12:09:29 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Brendan Mchugh 2006-10-06 03:44:51 EDT
Description of problem:

modprobe mga results in kernel panic.

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


How reproducible:


Steps to Reproduce:
1. Boot to runlevel 3
2. modprobe mga
Actual results:

kernel panic, ctrl-alt-del not working, requires power cycle.

Expected results:

mga module should load.

Additional info:

The PC is a HP xw4300 Workstation with 64-bit Pentium 4.
Graphics card is a Matrox G450 Quad-head pci card.

Results are the same using RHEL 4.4 i386 and RHEL 4.3 x86_64.

Installation with graphics mode works as expected, i'm guessing anaconda 
runs in vesa mode?

After installation, on the next boot the rhgb is started but all i see is a black 
screen and then the PC is locked up. 
I am guessing the starting of X automatically loads the mga driver which in 
turn causes a kernel panic but i am unable to switch to any vt or log in via 

Booting to runlevel 3 and running startx manually creates the same black screen 
and i am unable to switch to any vt or log in via ssh.

Booting to runlevel 3 and running modprobe mga causes kernel panic.

Works as expected on same hardware with Fedora Core 5 i386.
Works as expected using kernel.org version 2.6.18 compiled on RHEL 4.4 x86_64
Comment 1 Brendan Mchugh 2006-11-20 07:56:58 EST
still causes panic
Comment 2 Brendan Mchugh 2006-12-22 08:07:28 EST
(In reply to comment #1)
> still causes panic

still panicing
Comment 3 Brendan Mchugh 2007-01-18 03:29:55 EST
(In reply to comment #2)
> (In reply to comment #1)
> > still causes panic
> still panicing

Resolved by changing card to an nvidia quadro nvs 285 and using the nvidia
binary driver.

Leaving bug as new until there is a reply from someone other than myself.
Comment 5 Jiri Pallich 2012-06-20 12:09:29 EDT
Thank you for submitting this issue for consideration in Red Hat Enterprise Linux. The release for which you requested us to review is now End of Life. 
Please See https://access.redhat.com/support/policy/updates/errata/

If you would like Red Hat to re-consider your feature request for an active release, please re-open the request via appropriate support channels and provide additional supporting details about the importance of this issue.

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