On Wed, Dec 11, 2013 at 07:21:05AM -0500, Ilia Mirkin wrote: > >> On Thu, 5 Dec 2013 10:55:06 -0500 Ilia Mirkin wrote: > >> > On Thu, Dec 5, 2013 at 10:17 AM, Bruno Prémont wrote: > >> > > With drm-nouveau-next branch on top of 3.13-rc2 and a few sound commits > >> > > I get following errors in kernel log (repeating much more often). > >> > > (once there was a corrupted fbcon with matrix-like strings of > >> > > unrecognizable glyph-strings hanging down from screen top border) > >> > > > >> > > These errors do stop once I switch to Xorg. > >> > > > >> > > [ 13.825627] nouveau E[ PFB][0000:02:00.0] trapped write at > >> > > 0x0000408280 on channel 0x0000fee0 [unknown] BAR/PFIFO_WRITE/FB > >> > > reason: PAGE_NOT_PRESENT > >> > > [ 13.826506] nouveau E[ PFB][0000:02:00.0] trapped write at > >> > > 0x0000408280 on channel 0x0000fee0 [unknown] BAR/PFIFO_WRITE/FB > >> > > reason: PAGE_NOT_PRESENT > >> > > [ 13.827319] nouveau E[ PFB][0000:02:00.0] trapped write at > >> > > 0x0000408280 on channel 0x0000fee0 [unknown] BAR/PFIFO_WRITE/FB > >> > > reason: PAGE_NOT_PRESENT > >> > > [ 13.828139] nouveau E[ PFB][0000:02:00.0] trapped write at > >> > > 0x0000408280 on channel 0x0000fee0 [unknown] BAR/PFIFO_WRITE/FB > >> > > reason: PAGE_NOT_PRESENT > >> > > [ 13.828957] nouveau E[ PFB][0000:02:00.0] trapped write at > >> > > 0x0000400300 on channel 0x0000fee0 [unknown] BAR/PFIFO_WRITE/FB > >> > > reason: PAGE_NOT_PRESENT > >> > > > >> > > System MBA2,1 with: > >> > > 02:00.0 VGA compatible controller [0300]: NVIDIA Corporation C79 > >> > > [GeForce 9400M] [10de:0870] (rev b1) > >> > > >> > Do you also see these in 3.13-rc2 + > >> > http://cgit.freedesktop.org/nouveau/linux-2.6/commit/?h=drm-nouveau-next&id=a7e4201f0f7d47e03b851f06f8987856e8d33083 > >> > ? If not, you can reorder the patches (git rebase -i) and bisect the > >> > rest. Basically the GPU is trying to write to some address that is > >> > either completely bogus or is stale, and its internal MMU won't let > >> > it. > >> > >> If I remember correctly these did not happen with Linus' rc2 but only > >> do happen with drm-nouveau-next on top of it. > >> > >> I will check and bisect though probably will not get time to complete > >> bisect before late Saturday. > >> > >> > >> A display glitch during kernel boot with fbcon might be related to this. > >> (very wild guess based on when the trapped writes happen) > >> The penguin logo shown by fbcon looks like memcopy'ed to a tiled > >> framebuffer without respecting the fact that framebuffer is tiled. > > > > It was introduced somewhere between 3.12 and 3.13-rc2 though does not happen > > on every boot and when it happens it might be only a couple of trapped > > writes > > or a whole lot flooding complete log buffer. > > > > Visually it manifests itself as a scrambled framebuffer > > (looking like tiled versus untiled writing to framebuffer). > > When it happens, it seem to be correlated to call to dialog to ask for > > luks password and screen scrambling happens when boot messages > > (kernel/userspace) show/scroll by [they wipe out some scrambled area > > when scrolling by]. > > > > Unfortunately it will be rather hard to bisect because sometimes it does not > > happen. > > Adding drm-nouveau-next on top of rc2/rc3 does no apparent difference. > > A shot in the dark -- try booting with nouveau.config=NvMSI=0. We > already disable MSI for NVAA, perhaps we should do it for NVAC as > well. Although the blob drivers have it enabled... but we could be > doing something wrong.
Hi Ilia, FWIW a Fedora user got those messages on stock 3.13-rc6 with and without the "nouveau.config=nvMSI=0" boot option: [ 10.812029] nouveau E[ PFB][0000:01:00.0] trapped write at 0x0000525500 on channel 0x0001fed0 [unknown] BAR/PFIFO_WRITE/FB reason: PAGE_NOT_PRESENT This is via BZ https://bugzilla.redhat.com/show_bug.cgi?id=927451 hth, Michele -- Michele Baldessari <[email protected]> C2A5 9DA3 9961 4FFB E01B D0BC DDD4 DCCB 7515 5C6D _______________________________________________ Nouveau mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/nouveau
