(In reply to Ilia Mirkin from comment #76)

> 
> Weird, someone with a fairly identical GPU and nouveau comes up fine for
> them: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1327624

dmesg without workaround:

bozhan@bozhan:~$ dmesg | grep nouveau
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc5-amd64
root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet splash
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.3.0-rc5-amd64
root=UUID=d059e904-eec5-49ea-9e05-d3370455329c ro nouveau.runpm=0 quiet splash
[    6.429245] nouveau 0000:01:00.0: enabling device (0006 -> 0007)
[    6.429268] nouveau 0000:01:00.0: NVIDIA GK107 (0e70d0a2)
[    6.443237] nouveau 0000:01:00.0: bios: version 80.07.a8.00.0f
[    6.605738] nouveau 0000:01:00.0: fb: 2048 MiB GDDR5
[    6.605815] nouveau 0000:01:00.0: bus: MMIO write of 00000002 FAULT at
4188ac [ IBUS ]
[    6.676883] nouveau 0000:01:00.0: DRM: VRAM: 2048 MiB
[    6.676884] nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
[    6.676886] nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid
[    6.676904] nouveau 0000:01:00.0: DRM: DCB version 4.0
[    6.676906] nouveau 0000:01:00.0: DRM: Pointer to flat panel table invalid
[    6.914366] nouveau 0000:01:00.0: DRM: MM: using COPY for buffer copies
[    6.914370] [drm] Initialized nouveau 1.3.0 20120801 for 0000:01:00.0 on
minor 1
[   14.829712] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   16.831328] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   18.832940] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   20.834557] nouveau 0000:01:00.0: gr: wait for idle timeout (en: 1, ctxsw:
0, busy: 1)
[   22.836319] nouveau 0000:01:00.0: timeout at
/home/bozhan/nouveau/drm/nouveau/nvkm/engine/gr/ctxgf100.c:1365/gf100_grctx_generate()!
[   22.836389] nouveau 0000:01:00.0: gr: failed to construct context
[   22.836393] nouveau 0000:01:00.0: gr: init failed, -16

What in that bug report in launchpad is related to this one?