https://bugs.freedesktop.org/show_bug.cgi?id=103421
Bug ID: 103421
Summary: Kernel 4.13+ nouveau breaks screen output
Product: xorg
Version: unspecified
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Driver/nouveau
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
Created attachment 135010
--> https://bugs.freedesktop.org/attachment.cgi?id=135010&action=edit
kernel log
There is a regression with my
02:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF119 [NVS
310] [10de:107d] (rev a1)
where I would not get any graphics output anymore with Linux kernel
4.13.x, not even (framebuffer) text consoles.
There is a NULL pointer dereference around nvkm_dp_train_drive
visible in dmesg (attached)
and looking at the nouveau.ko disassembly, the faulting instruction was
a call to a variable address e.g. from
drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c:
ior->func->dp.drive(ior, i, ocfg.pc, ocfg.dc,
ocfg.pe, ocfg.tx_pu);
which was introduced in commit af85389c614ae
so maybe you have a hint at what might be wrong or how to further debug
this problem...
With 4.12.8, there was a different NULL pointer deref but some working
graphics.
I also tried 4.14-rc3 or such but that still had broken graphics.
Thanks in advance for any help
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