Created attachment 135010 [details] 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
I'm seeing the same problem on 4.13.11. I have the same video card: 03:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF119 [NVS 310] [10de:107d] (rev a1) And a NULL pointer dereference: [ 2.354551] nouveau 0000:03:00.0: DRM: allocated 1920x1080 fb: 0x60000, bo ffffa3167a6b2000 [ 2.455441] BUG: unable to handle kernel NULL pointer dereference at (null) [ 2.455444] IP: (null) [ 2.455445] PGD 0 [ 2.455446] P4D 0 [ 2.455448] Oops: 0010 [#1] SMP [ 2.455449] Modules linked in: ... [ 2.455471] Call Trace: [ 2.455476] ? nvkm_dp_train_drive+0x1e8/0x2d0 [ 2.455479] nvkm_dp_acquire+0x8eb/0xcd0 [ 2.455482] nv50_disp_super_2_2+0x6b/0x430 [ 2.455486] ? nvkm_devinit_pll_set+0xa/0x10 [ 2.455487] gf119_disp_super+0x1ac/0x2f0 [ 2.455492] process_one_work+0x193/0x430 [ 2.455493] ? process_one_work+0x136/0x430 [ 2.455495] worker_thread+0x49/0x450 [ 2.455499] kthread+0x109/0x140 [ 2.455500] ? create_worker+0x1a0/0x1a0 [ 2.455502] ? kthread_create_on_node+0x40/0x40 [ 2.455509] ret_from_fork+0x27/0x40 [ 2.455510] Code: Bad RIP value. [ 2.455514] RIP: (null) RSP: ffffbeed062afc10 [ 2.455514] CR2: 0000000000000000 [ 2.455517] ---[ end trace 85d5c96bafea0973 ]--- Please, see the full kernel.log attached.
Created attachment 135364 [details] kernel log
I think I have the same issue with the mobile version of that card: 01:00.0 VGA compatible controller: NVIDIA Corporation GF119M [Quadro NVS 4200M] (rev a1) It is an optimus setup, so the nvidia card is only used when I plug in a monitor into the DisplayPort. I compiled the kernel with commit af85389c614ae04970c0eea7a5c50fb889c8a480 and its parent. With the parent, there were no error messages from the kernel, but the output was static and full of glitches. With the mentioned commit, there were error messages from the kernel and no output at all. I attached the kernel log (with kernel version 4.13.11) and the dmesg output after plugging in a monitor into the Displayport (kernel compiled from commit af85389c614ae).
Created attachment 135374 [details] kernel log 4.13.11
Created attachment 135375 [details] dmesg after plugging monitor in Commit: af85389c614ae04970c0eea7a5c50fb889c8a480
This patch should fix the issue: https://patchwork.freedesktop.org/patch/196301/
I can confirm that this patch fixes the issue: https://patchwork.freedesktop.org/patch/196301/
I tested this patch and I can confirm that it fixed the issue.
The patch in Comment 6 has been in Linus' tree since 4.15-rc8, and I have just requested that it should be applied to 4.14 as well.
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