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[Xen-devel] Kernel 4.9+ Nouveau driver: CRASH

Dear all,

I'm experiencing the related problem as described here https://bug(see screenshot attached to the message).s.freedesktop.org/show_bug.cgi?id=94990 since kernel 4.9 (even with 4.10 and 4.11) with Qubes (Xen related). I obtain a blackscreen with kernel 4.9 and with kernel 4.11 Nouveau driver crash at boot time beginning with message (screenshot attached to the mail):

nouveau 0000:0c:00.0: bus: MMIO write of 80000130 FAULT at 10eb14 [ IBUS ]
nouveau 0000:0c:00.0: read fault at 00ff880000 engine 1f [] client 12 [PMU] reason 0d [REGION_VIOLATION] on channel -1 [0000000000 unknown]
nouveau 0000:0c:00.0: write fault at 00ff880000 engine 05 [BAR2] client 08 [HOST_CPU_NB] reason 0d [REGION_VIOLATION] on channel -1 [00ffbf3000 unknown]

I tried almost all the proposed debug options and solutions but it's still not working. Typically, removing Nouveau from the kernel (nouveau.modeset=0 or rd.driver.blacklist=nouveau) allows to boot in runlevel 3 only.

In consequence, I setup a Fedora 25 on another disk and Nouveau on kernel 4.9 and 4.11 works fine. It seems to be something related to Xen.

For information, my cpu is an AMD Ryzen 1800X, my motherboard is an Asrock X370 and I have a Nvidia GTX970 with 4Go.

Does anyone have an idea how can I debug or options I can pass to the kernel to successfully boot?

Thank you in advance,


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