Bug 6821 - Regression of mga driver: 1.4.1 has no output whatsoever unless I specify UseFBDev
Summary: Regression of mga driver: 1.4.1 has no output whatsoever unless I specify Use...
Status: RESOLVED INVALID
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/mga (show other bugs)
Version: unspecified
Hardware: x86 (IA32) Linux (All)
: high major
Assignee: Xorg Project Team
QA Contact:
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Keywords:
Depends on:
Blocks:
 
Reported: 2006-05-03 07:15 UTC by Dave Malcolm
Modified: 2018-06-12 19:09 UTC (History)
3 users (show)

See Also:
i915 platform:
i915 features:


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Description Dave Malcolm 2006-05-03 07:15:08 UTC
The latest modular mga driver has a regression; I get no visible output
whatsoever unless I specify 
  Option "UseFBDev" 
within the 
  Section "Device"
of my xorg.conf

Affected version: xorg-x11-drv-mga-1.4.1-1 (Fedora Core development) only works
if I specify UseFBDev
Working version: xorg-x11-drv-mga-1.2.1.3-1.2 (latest FC5) works without
UseFBDev (though I need to use -ignoreABI to get this to load)

Marking as "major" since this is a regression; this hardware has worked fine for
months without requiring edits to the configuration.

Please let me know if I need to supply other details to help track this down.

Adding ajax to CC as he investigated this on my hardware
Comment 1 Brian J. Murrell 2006-06-26 10:44:59 UTC
I am seeing this same problem on Mandriva Cooker now.  When X starts the monitor
just goes into DPMS Suspend mode and there is no output.

Is there anything I can do short of reverting the driver to the 1.2.1 rev (which
I don't have handy)?
Comment 2 Matthijs Kooijman 2006-10-13 11:01:54 UTC
I'm experiencing exactly the same thing on debian/unstable with my G200.

For reference, this problem is also referenced here:
https://launchpad.net/distros/debian/+source/xserver-xorg-video-mga/+bug/58721
http://thread.gmane.org/gmane.comp.freedesktop.xorg/7169/focus=7169
http://thread.gmane.org/gmane.comp.freedesktop.xorg/7146/focus=7146

I will try if I can pinpoint the exact version of the driver that broke this (If
I can get mga from CVS/SVN/whatever compile, that is).
Comment 3 Matthijs Kooijman 2006-10-13 12:04:28 UTC
Okay, just compiled latest git version and it works. So, whatever has broken
exactly, it got fixed since 1.4.2 (I also checked that checking out 1.4.2 from
gets me a broken version).

I might try to pinpoint exactly which version fixes the problem this weekend.
Comment 4 Matthijs Kooijman 2006-10-14 07:11:23 UTC
Okay, it seems the first git commit after 1.4.2 fixes the problem. I'm not
really sure how to call it (does git have revision numbers or something?), but I
mean this one:
http://gitweb.freedesktop.org/?p=xorg/driver/xf86-video-mga.git;a=blobdiff;h=25da5a13ef385b0ea49efb4808cd8168504fa7d8;hp=6583b0c47cec39cfeca953a4e4ed6b798406f55e;hb=69cc0060d9516d5fba5fa46607a993f3ebfd5d89;f=src/mga_exa.c

So releasing a new version soon should fix this problem for a lot of users. 
Comment 5 Matthijs Kooijman 2006-10-23 08:23:55 UTC
I've just confirmed that version 1.4.3 indeed fixes the problem on my G200. Time
to close this bug?
Comment 6 Tilman Sauerbeck 2006-11-19 12:19:46 UTC
(In reply to comment #4)
> Okay, it seems the first git commit after 1.4.2 fixes the problem. I'm not
> really sure how to call it (does git have revision numbers or something?), but I
> mean this one:
>
http://gitweb.freedesktop.org/?p=xorg/driver/xf86-video-mga.git;a=blobdiff;h=25da5a13ef385b0ea49efb4808cd8168504fa7d8;hp=6583b0c47cec39cfeca953a4e4ed6b798406f55e;hb=69cc0060d9516d5fba5fa46607a993f3ebfd5d89;f=src/mga_exa.c

This doesn't make sense. That patch only affects EXA, and the mention operation
isn't supported on a G200.

If you can, it would be cool if you could use git-bisect
(http://www.kernel.org/pub/software/scm/git/docs/git-bisect.html) to find the
commit that introduced the bug.

I'm not sure you're seeing the same problem that Dave reported.

Dave, what hardware did you see this problem on? Does 1.4.3 or 1.4.4 work for
you, too?
Comment 7 Benjamin Close 2008-01-11 02:38:07 UTC
Bugzilla Upgrade Mass Bug Change

NEEDSINFO state was removed in Bugzilla 3.x, reopening any bugs previously listed as NEEDSINFO.

  - benjsc
    fd.o Wrangler
Comment 8 Adam Jackson 2018-06-12 19:09:09 UTC
Mass closure: This bug has been untouched for more than six years, and is not
obviously still valid. Please reopen this bug or file a new report if you continue to experience issues with current releases.


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