[Bug 26199] New: kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[Bug 26199] New: kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199

           Summary: kernel oops in 2.6.33 rc5 when dri is set to off in
                    xorg.conf
           Product: DRI
           Version: XOrg CVS
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.sourceforge.net
        ReportedBy: phercek@gmail.com


Created an attachment (id=32797)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=32797)
dmesg with dri off and booting to X

If option dri is set to off and I'm booting to X then I get the oops. When it
is set to on (or I boot only to console) I do not get the oops. Still the
acceleration is not working when dri is set to on. It complains about dri
version mismatch which is strange since I compiled libdrm with
--enable-radeon-experimental-api and I recompiled xf86-video-ati and mesa only
after the new libdrm was installed. But this is probably a separate issue.
Anyway looks to me it should not be possible to make kernel oops so here is the
report. Ach, and it is an agp system but I never had any stability problems
with it on windows (also worked very well with 2.6.30 and agd5f's r6xx-r7xx-3d
drm module with agp 8x and even the fast writes).

I'll attach dmesg with the oops and also without it (a boot to console).


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[Bug 26199] kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199





--- Comment #1 from Peter Hercek <phercek@gmail.com>  2010-01-24 12:18:25 PST ---
Created an attachment (id=32798)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=32798)
dmesg when I booted to console only


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[Bug 26199] kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199





--- Comment #2 from Alex Deucher <agd5f@yahoo.com>  2010-01-25 08:00:17 PST ---
Please attach your xorg log and config.


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[Bug 26199] kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199





--- Comment #3 from Peter Hercek <phercek@gmail.com>  2010-01-25 13:41:38 PST ---
I cannot simulate the bug as it was when I reported the error. I'll attach the
exact xorg.conf I used, but I do not have Xorg.0.log any more. But I looked at
it when the errors happened and there were not any errors or warnings which are
not in the Xorg.0.log I'll attach. But the log I'll attach is when I booted
2.6.32.
I thought the error is repeatable since I tried 2 times and it happened 2
times. But I do not think so any more. It is not a problem to crash it again,
but this time the machine is completely locked up, not even ssh works. Computer
does not seem to react to keyboard too (keyboard leds do work though).
When I set radeon.agpmode=-1 on the kernel command line I'm not able to make
the kernel crash. I tried 6 times. Without setting agpmode to -1 it crashes
with probability of about 0.5 when DRI is off. When DRI is on it typically does
not crash.
So it looks like it is related to AGP. I did not have any AGP related problems
in linux before nor I have them in windows now.


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[Bug 26199] kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199





--- Comment #4 from Peter Hercek <phercek@gmail.com>  2010-01-25 13:42:26 PST ---
Created an attachment (id=32812)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=32812)
xorg.conf when the error happend


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[Bug 26199] kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199


Peter Hercek <phercek@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #32812|application/octet-stream    |text/plain
          mime type|                            |




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[Bug 26199] kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199





--- Comment #5 from Peter Hercek <phercek@gmail.com>  2010-01-25 13:47:29 PST ---
Created an attachment (id=32813)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=32813)
Xorg.log (not when the eroror happend, everything the same except kernel)

Notice that when the error happened as I described it the first time the
machine did boot to X at the end and was usable (without dri with sw renderer).
Not sure whether X server was restarted though. My guess would be that not but
I did not check it.


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[Bug 26199] kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199





--- Comment #6 from Michel Dänzer <michel@daenzer.net>  2010-01-26 02:02:52 PST ---
(In reply to comment #3)
> When I set radeon.agpmode=-1 on the kernel command line I'm not able to make
> the kernel crash. I tried 6 times. Without setting agpmode to -1 it crashes
> with probability of about 0.5 when DRI is off. When DRI is on it typically does
> not crash.

radeon.agpmode only has an effect if KMS is enabled, in which case an X driver
with KMS support can't really work without the DRI; not sure what happens if
you try. But from

> It complains about dri version mismatch which is strange since I compiled
> libdrm with --enable-radeon-experimental-api [...]

it sounds like your X driver doesn't have KMS support built in, in which case
it's not expected to work properly at all if KMS is enabled.

In summary, unless your X log contains a line like

(II) [KMS] Kernel modesetting enabled.

without Option "DRI" "off", this report is probably invalid.


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[Bug 26199] kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199





--- Comment #7 from Peter Hercek <phercek@gmail.com>  2010-01-26 03:35:05 PST ---
(In reply to comment #6)
> In summary, unless your X log contains a line like
> 
> (II) [KMS] Kernel modesetting enabled.
> 
> without Option "DRI" "off", this report is probably invalid.

Ok, so this report is invalid since when I run without radeon.agpmode=-1 and
when Option DRI is on then I do not have line

(II) [KMS] Kernel modesetting enabled.

in my Xorg.log.


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[Bug 26199] kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199





--- Comment #8 from Peter Hercek <phercek@gmail.com>  2010-01-26 06:44:20 PST ---
I had incorrectly (with --disable-kms) compiled xf86-video-ati. I recompiled
everything (libdrm, mesa, xf86-xf86-video-ati) today from git master and it
seems to work ... well until I try to put "video=1280x1024" on kernel command
line. Then I get another hard kernel crash and lockup. But that is probably
something completely different. Should I create a bug report for it?

Btw it looks like Bug 18397 (Small pixmap corruption [EXA enabled]) is not
there any more with kernel mode setting enabled.


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[Bug 26199] kernel oops in 2.6.33 rc5 when dri is set to off in xorg.conf

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26199


Peter Hercek <phercek@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID




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