Dear nouveau developers and community,

I#m using nouveau on a MacBook Pro mid 2008, with GeForce 8600M GT und Linux kernel 4.14.90 under NixOS.

After some 30 to 50 minutes of working, the X server always freezes and gives scattered image. Moving the mouse is often possible, but clicking or typing are without any effect.

Loging in with ssh is still possible. I also tried to restart the X server, but it hangs so hard, the only pressing power off button helps.

Here are the nouveau related logs from systemd.

----during boot---

Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: NVIDIA G84 (084700a2)
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: Invalid PCI ROM header signature: expecting 0xaa55, got 0xffff
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: bios: version 60.84.49.03.00
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: fb: 256 MiB GDDR3

[...]

Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: VRAM: 256 MiB
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: TMDS table version 2.0
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: DCB version 4.0
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: DCB outp 00: 01000123 00010034
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: DCB outp 01: 02011210 00000028
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: DCB outp 02: 02011212 00000030
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: DCB outp 03: 01011211 0080c070
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: DCB conn 00: 0040
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: DCB conn 01: 1120
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: unknown connector type 20
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: failed to create encoder 0/1/0: -19

[...]

Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: MM: using CRYPT for buffer copies
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: DRM: allocated 1440x900 fb: 0x70000, bo ffff99eff1428000
Jan 20 07:00:07 hackbetz kernel: Console: switching to colour frame buffer device 180x56
Jan 20 07:00:07 hackbetz kernel: nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device
Jan 20 07:00:07 hackbetz kernel: [drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on minor 0
Jan 20 07:00:07 hackbetz kernel: audit: type=1130 audit(1547964002.868:7): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-backlight@leds:smc::kbd_b>


--- on crash this message repeats over and over ---

Jan 20 07:46:51 hackbetz kernel: nouveau 0000:01:00.0: gr: PGRAPH TLB flush idle timeout fail
Jan 20 07:46:51 hackbetz kernel: nouveau 0000:01:00.0: gr: PGRAPH_STATUS 00000603 [BUSY DISPATCH VFETCH CCACHE_PREGEOM]
Jan 20 07:46:51 hackbetz kernel: nouveau 0000:01:00.0: gr: PGRAPH_VSTATUS0: 00000009 [VFETCH CCACHE]
Jan 20 07:46:51 hackbetz kernel: nouveau 0000:01:00.0: gr: PGRAPH_VSTATUS1: 00000000 []
Jan 20 07:46:51 hackbetz kernel: nouveau 0000:01:00.0: gr: PGRAPH_VSTATUS2: 00000000 []


Any ideas?

Thanks a lot to all of you writing this software!