Created attachment 118729 [details] dmesg Dmesg tells me to report here the following. The machine is an ASUS f555 laptop with hybrid intel/AMD graphics. At boot, GPU hangs as per attached messages. At the moment the only way I've found to have X is to boot with the nomodeset option. mauro@pedro ~ $ uname -a Linux pedro 4.1.8-nrj-laptop-1rosa-x86_64 #1 SMP PREEMPT Tue Sep 22 16:16:51 UTC 2015 x86_64 GNU/Linux mauro@pedro ~ $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09) 04:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mars LE [Radeon HD 8530M / R5 M240]
Created attachment 118730 [details] /sys/class/drm/card1/error content
Batch gtt_offset = 0xffffffff
The page tables look very confused. First step would be intel_iommu=igfx_off.
Thanks for looking into this. Here is the result booting with intel_iommu=igfx_off. The 'GPU HANG' error is still there but at least i can start X now.
Created attachment 118857 [details] /sys/class/drm/card1/error with intel_iommu=igfx_off
Created attachment 118858 [details] dmesg with intel_iommu=igfx_off
We seem to have neglected the bug a bit, apologies. There were improvements pushed in kernel and Mesa that will benefit to your system, so please re-test with latest kernel & Mesa to see if this issue is still occurring.
(In reply to yann from comment #7) > We seem to have neglected the bug a bit, apologies. > > There were improvements pushed in kernel and Mesa that will benefit to your > system, so please re-test with latest kernel & Mesa to see if this issue is > still occurring. Timeout. Assuming that it is fixed by now. If this is not the case, please re-test with latest kernel & Mesa (12-13) to see if this issue is still occurring since there were improvements pushed in kernel and Mesa that will benefit to your system.
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