[Bug 26812] New: Radeon module causes hard reset on modprobe

[Bug 26812] New: Radeon module causes hard reset on modprobe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=26812

           Summary: Radeon module causes hard reset on modprobe
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.37-git9
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: mjevans1983@gmail.com
        Regression: No


I'm using the git snapshots between when Linus merged from drm-core-next and
when network drivers were merged (breaks build).

If there is a better patch relative to a released source I'll gladly test it
too; however the other sources I tried also had similar issues.

When radeon.ko (or build in init) starts the screens blank and a few seconds
later the system completely reboots.  This is 100% repeatable.

I have firmware from Arch's (AUR) linux-firmware-git package installed,
/lib/firmware pointed as the source, and the relevant blobs for the recent
ATI/AMD GPUs.

When built as a module I can modprobe radeon to trigger the exact same
behavior.

Problems debugging:
* It resets so hard there isn't a peep from netconsole.
* It resets so hard that my disks loose md raid sync and need to completely
rebuild (yeah, I know, I'll add a write-intent log before I test this again
next time...; it wasn't an issue before I got the brainwave of making it a
module to try to give netconsole/syslog time to get setup.)

How can I possibly approach isolating this?  Even a link to the correct
documentation would be helpful.

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[Bug 26812] Radeon module causes hard reset on modprobe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=26812


Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com




--- Comment #1 from Alex Deucher <alexdeucher@gmail.com>  2011-01-15 22:11:00 ---
What radeoon chip do you have?  If it's an r6xx, r7xx, or evergreen asic, this
possibly a duplicate of this bug:
https://bugs.freedesktop.org/show_bug.cgi?id=33027
If so, does the patch there help?

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[Bug 26812] Radeon module causes hard reset on modprobe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=26812





--- Comment #2 from Michael Evans <mjevans1983@gmail.com>  2011-01-16 01:41:59 ---
It's a 6850 with two DVI's in use.  I think that's a "Northern Islands" chip?

The system is an Athlon II x4, 00:00.0 Host bridge: Advanced Micro Devices
[AMD] RS880 Host Bridge ( M4A785TD-V EVO vendor: ASUSTeK Computer INC. )

I'm going to try booting a copy of drm-next's tree that finished compiling
while I was running errands; it should have everything possible already.

drm-2.6-drm-next-56bec7c

-

Nope, that totally failed too.  I'm going to collect some system information
and what logs I can.

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[Bug 26812] Radeon module causes hard reset on modprobe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=26812





--- Comment #3 from Michael Evans <mjevans1983@gmail.com>  2011-01-16 02:09:58 ---
Created an attachment (id=43702)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=43702)
lspci, dmidecode, config and netconsole logs

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[Bug 26812] Radeon module causes hard reset on modprobe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=26812





--- Comment #4 from Michael Evans <mjevans1983@gmail.com>  2011-01-16 05:57:33 ---
I noticed something when looking at the files in /lib/firmware/radeon to make
sure I had /all/ the correct ones in place.  BARTS*, which wasn't in my config
(I copy/pasted an example for that section without paying it much attention,
and wouldn't have remembered which chip codename I had anyway.) when added
allows at /least/ drm-next to work correctly.

There are two outstanding issues I noticed however.
1) When the firmware isn't found the module very un-gracefully reboots without
//any// explanation (no information provided to lead to enlightenment). 
Correct behavior should be to fail gracefully and provide a clean message in
the kernel log without taking the system fully offline.

2) the EXTRA firmware line has a size limit.  I didn't look at what it was
exactly, but it can't contain the expansion of cd /lib/firmware; ls radeon/* ;
a more preferable solution might be to allow the use of shell wildcards (or
document that they are evaluated).


I am --not-- marking this as resolved since the first issue is still a major
problem (it makes this error non-trivial to diagnose for no good reason).

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[Bug 26812] Radeon module causes hard reset on modprobe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=26812





--- Comment #5 from Alex Deucher <alexdeucher@gmail.com>  2011-02-02 17:52:27 ---
Created an attachment (id=46072)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=46072)
Don't load if MC ucode is not available

The default boot state only allows limited operation.

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[Bug 26812] [RADEON:KMS:BARTS:HD6850:FIRMWARE] radeon module causes hard reset on modprobe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=26812


Jérôme Glisse <glisse@freedesktop.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |glisse@freedesktop.org
            Summary|Radeon module causes hard   |[RADEON:KMS:BARTS:HD6850:FI
                   |reset on modprobe           |RMWARE] radeon module
                   |                            |causes hard reset on
                   |                            |modprobe




--- Comment #6 from Jérôme Glisse <glisse@freedesktop.org>  2011-03-08 18:06:22 ---
Michael please confirm Alex fixed the issue (should be upstream already)

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[Bug 26812] [RADEON:KMS:BARTS:HD6850:FIRMWARE] radeon module causes hard reset on modprobe

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=26812


Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |alan@lxorguk.ukuu.org.uk
         Resolution|                            |OBSOLETE




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