On Mon, Feb 10, 2014 at 10:12 AM, Rafał Miłecki <zajec5@xxxxxxxxx> wrote: > 2014-02-09 23:12 GMT+01:00 Ilia Mirkin <imirkin@xxxxxxxxxxxx>: >> On Sun, Feb 9, 2014 at 5:08 PM, Rafał Miłecki <zajec5@xxxxxxxxx> wrote: >>> Last week I've switched from my old & good 3.4.63 to 3.14-rc1 and >>> noticed nasty display corruptions when using nouveau. It seems that >>> changing parts of the screen are appearing for a fraction of second in >>> random places. I've recorded this behavior: >>> http://www.youtube.com/watch?v=IEq7JzGVzj0 >>> >>> My hardware is some old motherboard with >>> 00:05.0 VGA compatible controller [0300]: NVIDIA Corporation C51G >>> [GeForce 6100] [10de:0242] (rev a2) >>> integrated. Since my CPU is ancient AMD Sempron(tm) Processor 2800+ it >>> took me few days to track this issue. >>> >>> There goes some summary of various kernels: >>> >>> 1) 3.4.63 >>> No display problems. Works great. >>> >>> 2) commit 928c2f0c006bf7f381f58af2b2786d2a858ae311 >>> drm/fb-helper: don't sleep for screen unblank when an oops is in progress >>> Scrollbars have a pink line. I didn't track which commit introduced >>> this pink corruption. No other problems. >>> >>> 3) commit c21eb21cb50d58e7cbdcb8b9e7ff68b85cfa5095 >>> Revert "drm: mark context support as a legacy subsystem" >>> This fixes pink lines on scrollbars and introduces this nasty display >>> corruption. It's one commit after previous one. >>> It means it's the first bad commit for these nasty corruptions recoded >>> and uploaded to YouTube. >>> >>> 4) 3.14-rc1 >>> No changes since c21eb21cb50d58e7cbdcb8b9e7ff68b85cfa5095. No pink >>> lines, but display corruptions happening. >> >> Can you boot with nouveau.config=NvMSI=0 ? If that helps, there are >> some patches on the nouveau/dri-devel lists (search for "nv4c") that >> may help you. > > Unfortunately this config parameter doesn't help :( Too bad. It may still be worthwhile applying the patches and seeing what happens... it seems like some registers got switched around on the nv4x IGP's: http://lists.freedesktop.org/archives/nouveau/2014-February/016032.html http://lists.freedesktop.org/archives/nouveau/2014-February/016033.html http://lists.freedesktop.org/archives/nouveau/2014-February/016034.html BTW, youtube says "this video is unavailable". Is there anything in dmesg when the display corruptions happen? There was also an issue with libdrm_nouveau for pre-nv50 chips, when compiled with gcc-4.8 some time back... fixed in... 2.4.48 or so? Lastly, it may be worth trying 3.11.x and 3.12.x to get a better handle on when problems happened. The commits you cite are in the middle of releases, and may have various badness associated with them (e.g. 3.12-rc had a later-disabled MSI implementation, back in 3.13... probably some other stuff). -ilia _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
