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2017 Oct 23
9
[Bug 103421] New: Kernel 4.13+ nouveau breaks screen output
...soles.
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 trie...