Bug 25682 - radeon drm (linux 2.6.3x) loaded with modeset=1 + 2x ATI 4850 (RV770) in CrossfireX=> crash and blank screen
Summary: radeon drm (linux 2.6.3x) loaded with modeset=1 + 2x ATI 4850 (RV770) in Cro...
Status: RESOLVED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium critical
Assignee: Default DRI bug account
QA Contact:
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Depends on:
Blocks:
 
Reported: 2009-12-16 19:39 UTC by 404 Error
Modified: 2010-06-25 16:07 UTC (History)
0 users

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i915 platform:
i915 features:

Attachments
Log of the crash (18.81 KB, text/plain)
2009-12-16 19:39 UTC, 404 Error 		no flags Details
/var/log/messages (2.6.33-rc4) (8.50 KB, text/x-log)
2010-01-15 06:29 UTC, 404 Error 		no flags Details
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Description 404 Error 2009-12-16 19:39:51 UTC 
Created attachment 32136 [details]
Log of the crash 

From the console of a machine equipped of two ATI 4850 (RV770) linked in CrossfireX loading the radeon kernel module with modeset=1 results in a crash (see attached log) and a black screen. Disabling KMS makes the the radeon kernel module being loaded without any issues.

When the screen turns black, the LED of my monitor does not blink so a signal seems to be detected by the monitor (digital connection).

If I can be of any help, please just mention what I should do to provide more details/traces/etc.
Comment 1 404 Error 2010-01-15 06:27:07 UTC 
Tested again with the 2.6.33-rc4 : this time the screen becomes blank and the LED on the front panel blinks indicating no valid signal. See attached log.


lspci:
======

03:00.0 VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD 4850]
03:00.1 Audio device: ATI Technologies Inc HD48x0 audio
04:00.0 VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD 4850]
04:00.1 Audio device: ATI Technologies Inc HD48x0 audio

xorg.conf:
==========
Section "Device"
        Identifier  "ATI4850-card0"
        BusID       "PCI:3:0:0"
        ...
EndSection

Section "Device"
        Identifier  "ATI4850-card1"
        BusID       "PCI:4:0:0"
        ...
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "ATI4850-card0"
...
EndSection
Comment 2 404 Error 2010-01-15 06:29:48 UTC 
Created attachment 32660 [details]
/var/log/messages (2.6.33-rc4)
Comment 3 404 Error 2010-01-15 06:32:03 UTC 
FYI, the first bug description and  the "Log of crash" attachment were made for linux 2.6.32. I renamed the bug description as it happens under Linux 2.6.33 too.
Comment 4 404 Error 2010-06-25 16:07:09 UTC 
Same troubles noted under 2.6.33 and 2.6.34. 

Trouble gone away in 2.6.35 ! Unfortunately I face to some other issues...

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