Comment # 6
on bug 108857
from Victor Costan
I ran into the same problem since I upgraded to 4.19. I've been using the 4.18 kernel to get my work done. I just tried the 4.19 and 4.20 vanilla kernels packaged for Fedora, and the problem is still there. I've been suspecting the Spectre mitigations until I found this bug -- I now tried the proprietary nvidia driver, and it seems to have made the problem go away. In case it helps, I have a GTX1080 founders' edition. Relevant lines from dmesg: [ 1.745599] nouveau 0000:01:00.0: NVIDIA GP104 (134000a1) [ 1.852957] nouveau 0000:01:00.0: bios: version 86.04.17.00.01 [ 1.853407] nouveau 0000:01:00.0: bios: M0203E type 08 [ 1.853440] nouveau 0000:01:00.0: fb: 8192 MiB of unknown memory type [ 1.893737] [TTM] Zone kernel: Available graphics memory: 16445892 kiB [ 1.893738] [TTM] Zone dma32: Available graphics memory: 2097152 kiB [ 1.893738] [TTM] Initializing pool allocator [ 1.893741] [TTM] Initializing DMA pool allocator [ 1.893750] nouveau 0000:01:00.0: DRM: VRAM: 8192 MiB [ 1.893751] nouveau 0000:01:00.0: DRM: GART: 536870912 MiB [ 1.893752] nouveau 0000:01:00.0: DRM: BIT table 'A' not found [ 1.893753] nouveau 0000:01:00.0: DRM: BIT table 'L' not found [ 1.893754] nouveau 0000:01:00.0: DRM: TMDS table version 2.0 [ 1.893755] nouveau 0000:01:00.0: DRM: DCB version 4.1 [ 1.893756] nouveau 0000:01:00.0: DRM: DCB outp 00: 01000f42 00020030 [ 1.893757] nouveau 0000:01:00.0: DRM: DCB outp 01: 04811f96 04600020 [ 1.893757] nouveau 0000:01:00.0: DRM: DCB outp 02: 04011f92 00020020 [ 1.893758] nouveau 0000:01:00.0: DRM: DCB outp 03: 04822f86 04600010 [ 1.893759] nouveau 0000:01:00.0: DRM: DCB outp 04: 04022f82 00020010 [ 1.893760] nouveau 0000:01:00.0: DRM: DCB outp 06: 02033f62 00020010 [ 1.893761] nouveau 0000:01:00.0: DRM: DCB outp 07: 02844f76 04600020 [ 1.893762] nouveau 0000:01:00.0: DRM: DCB outp 08: 02044f72 00020020 [ 1.893762] nouveau 0000:01:00.0: DRM: DCB conn 00: 00001031 [ 1.893763] nouveau 0000:01:00.0: DRM: DCB conn 01: 02000146 [ 1.893764] nouveau 0000:01:00.0: DRM: DCB conn 02: 01000246 [ 1.893765] nouveau 0000:01:00.0: DRM: DCB conn 03: 00010361 [ 1.893765] nouveau 0000:01:00.0: DRM: DCB conn 04: 00020446 [ 1.998241] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 1.998243] [drm] Driver supports precise vblank timestamp query. [ 2.043058] nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies [ 2.374601] nouveau 0000:01:00.0: DRM: allocated 3840x2160 fb: 0x200000, bo 00000000ae0f5db6 [ 2.374656] fbcon: nouveaufb (fb0) is primary device [ 2.374657] fbcon: Deferring console take-over [ 2.374658] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device [ 2.393355] [drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on minor 0 [ 2.470633] nouveau 0000:01:00.0: disp: 0x000064f7[0]: INIT_GENERIC_CONDITON: unknown 0x07 [ 40.934912] nouveau 0000:01:00.0: disp: chid 1 mthd 0000 data 00000000 00003000 00000000 [ 40.934931] nouveau 0000:01:00.0: disp: chid 1 mthd 0004 data 08700f00 10003004 00000000 [ 40.934948] nouveau 0000:01:00.0: disp: chid 1 mthd 0008 data 0000f004 10003008 00000000 [ 40.934966] nouveau 0000:01:00.0: disp: chid 1 mthd 000c data 0000cf00 1000300c 00000000 [ 40.934977] nouveau 0000:01:00.0: disp: chid 1 mthd 0010 data 20000000 10003010 00000000 [ 40.934992] nouveau 0000:01:00.0: disp: chid 1 mthd 0014 data 00000000 10003014 00000000 [ 40.935002] nouveau 0000:01:00.0: disp: chid 1 mthd 0018 data 00000000 10003018 00000000 [ 40.935015] nouveau 0000:01:00.0: disp: chid 1 mthd 001c data 00000000 1000301c 00000000 [ 40.935024] nouveau 0000:01:00.0: disp: chid 1 mthd 0020 data 00000000 10003020 00000000 [ 40.935037] nouveau 0000:01:00.0: disp: chid 1 mthd 0000 data 00000400 10001000 00000002 [ 42.935037] nouveau 0000:01:00.0: DRM: base-0: timeout [ 44.937059] nouveau 0000:01:00.0: DRM: base-0: timeout [ 46.940112] nouveau 0000:01:00.0: DRM: base-0: timeout [ 48.942221] nouveau 0000:01:00.0: DRM: base-0: timeout [ 73.444493] nouveau 0000:01:00.0: DRM: base-0: timeout [ 91.300747] nouveau 0000:01:00.0: DRM: base-0: timeout [ 93.306492] nouveau 0000:01:00.0: DRM: base-0: timeout [ 95.310609] nouveau 0000:01:00.0: DRM: base-0: timeout [ 111.646135] nouveau 0000:01:00.0: DRM: base-0: timeout [ 113.648187] nouveau 0000:01:00.0: DRM: base-0: timeout [ 115.649874] nouveau 0000:01:00.0: DRM: base-0: timeout [ 117.650629] nouveau 0000:01:00.0: DRM: base-0: timeout [ 120.902222] nouveau 0000:01:00.0: DRM: base-0: timeout [ 122.902900] nouveau 0000:01:00.0: DRM: base-0: timeout [ 124.903509] nouveau 0000:01:00.0: DRM: base-0: timeout [ 126.904112] nouveau 0000:01:00.0: DRM: base-0: timeout [ 154.470730] nouveau 0000:01:00.0: DRM: base-0: timeout [ 214.470998] nouveau 0000:01:00.0: DRM: base-0: timeout [ 274.471269] nouveau 0000:01:00.0: DRM: base-0: timeout [ 334.470469] nouveau 0000:01:00.0: DRM: base-0: timeout [ 394.470680] nouveau 0000:01:00.0: DRM: base-0: timeout [ 454.470846] nouveau 0000:01:00.0: DRM: base-0: timeout
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