On Sat, Feb 6, 2010 at 2:47 PM, Émeric Maschino <emeric.masch...@gmail.com> wrote: > 2010/2/4 Jerome Glisse <gli...@freedesktop.org>: >> IIRC old radeon drm doesn't have any thing to dump GPU command stream. >> Look at http://www.x.org/docs/AMD/R5xx_Acceleration_v1.4.pdf to see >> what radeon GPU stream command looks like (packet pm4 stuff). Note that >> dump GPU command stream can quickly eat Gigs of data and finding what >> is causing the lockup is then very cumberstone especialy as in your >> case it sounds like it's a timing issue. You might want to force your >> card into pci mode to see if it's agp related. > > Yep, setting Option "BusType" "PCI" in /etc/X11/xorg.conf prevents > from GPU lockup. > > A a side note, strace glxinfo and strace glxgears still give me read() > errors on /tmp/.X11-unix/X0, so they're probably not related to GPU > lockup. > > Anyway, I don't know whether this is due to PCI mode or not, but > OpenGL performances, although there's no more GPU lockup, are poor. > And serious OpenGL applications, as simulated by the SPECviewperf test > suite, have very irregular frame rates. If I'm not mistaken, the > BusType option is specific to the radeon driver (or maybe other > drivers too)? I mean, it's not a X.org wide configuration option, > isn't it? This would thus narrow my investigation path to the AGP code > of the radeon driver, right?
AGP is somewhat broken by design. There are alots of subtle incompatibilities and quirks between different AGP and GPU combinations. Your best bet is to play with the agp options in your bios, or try adjusting the agpmode option: Option "AGPMode" "x" where x = 1 or 2 or 4 or 8 If you find a mode that works, we can add a quirk for your chipset/gpu combination. Alex ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
