Bug 104738

Summary: Radeon HD 6970M/6990M crash on iMac on boot - only nomodeset helps
Product: DRI Reporter: hansmatros76
Component: DRM/RadeonAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: medium CC: kai.heng.feng
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg
none
dmesg.log
none
lspci.log
none
grub.cfg none

Description hansmatros76 2018-01-22 19:31:40 UTC 
Created attachment 136905 [details]
dmesg

Dear Developers!

I have this bug on different Linux kernels. Only with 4.15.0-041500rc8 i am able to boot, but there is no hardware acceleration.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1743427

If you need more informations please let me know.

Best regards,

Hans
Comment 1 Michel Dänzer 2018-01-23 09:19:17 UTC 
Does radeon.uvd=0 on the kernel command line help?
Comment 2 Alex Deucher 2018-01-23 15:01:52 UTC 
Can you attach your full dmesg output?
Comment 3 hansmatros76 2018-01-24 15:31:38 UTC 
Created attachment 136941 [details]
dmesg.log
Comment 4 hansmatros76 2018-01-24 15:32:00 UTC 
Created attachment 136942 [details]
lspci.log
Comment 5 hansmatros76 2018-01-24 15:32:17 UTC 
Created attachment 136943 [details]
grub.cfg
Comment 6 hansmatros76 2018-01-24 15:33:05 UTC 
Thanks for your replay

@Michel

Tested but the system crash and the screen becomes only black.

@Alex

Done
Comment 7 Michel Dänzer 2018-01-24 16:15:35 UTC 
I suspect Alex meant the full dmesg output without nomodeset. :)
Comment 8 hansmatros76 2018-01-24 17:48:15 UTC 
Thanks but how can a do this?

Without this option in Grub i only see 1 second a few lines, then the monitor switch into a black screen. nothing happens anymore. also am not able to ping the host. i have to press the power button for a few seconds to force a shutdown.
Comment 9 Alex Deucher 2018-01-24 18:48:06 UTC 
(In reply to hansmatros76 from comment #8)
> Thanks but how can a do this?

You attached a partial dmesg output in comment 0. Can you just remove the grep so we get the full output?
Comment 10 Alex Deucher 2018-01-24 18:50:52 UTC 
Is this a regression?  Did it work previously?  If so, with what kernel?
Comment 11 Martin Peres 2019-11-19 09:31:39 UTC 
-- GitLab Migration Automatic Message --

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