https://bugzilla.kernel.org/show_bug.cgi?id=34772
--- Comment #9 from Rogério Brito <rbr...@ime.usp.br> 2011-05-21 09:16:28 --- Hi, Michel. On Fri, May 20, 2011 at 12:11, <bugzilla-dae...@bugzilla.kernel.org> wrote: > --- Comment #6 from Michel Dänzer <mic...@daenzer.net> 2011-05-20 12:11:38 > --- > (In reply to comment #1) >> Anyway, things are *way* better with 2.6.38 than with 2.6.39, as with 2.6.39 >> the kernel doesn't even get the colors correctly---everything that should be >> red becomes blue and so forth (any kind of endianness problem?). > > That's probably nothing to do with the kernel directly but endianness bugs in > the X driver when acceleration is not available. OK, then that's a separate issue. Good to know. > It would be interesting if you could bisect what broke acceleration with > radeon.agpmode=-1. Oooh, I guess that I made some mess in your head here, taking into account the other messages of us. To clear things up: When I use 2.6.38, it works mostly OK if I use radeon.agpmode=-1. It is sufficiently stable to the point that I told you that this setting was OK. But, in fact, if I play a video with mplayer, then it always (so far, 100% reproducible) causes those GPU lockups, but the computer is still accessible via the network, so that I can take the logs etc. If, instead, I use 1 instead of -1, then, even with kernel 2.6.38, I get those lysergide-like :-) pictures that I put on my homepage (but, for documentation purposes, I am thinking of uploading here as attachments, as I am quite short of space there). With kernel 2.6.39, I have not been able to get anything working, whether or not I pass any option to the kernel. Summary: * 2.6.38 with KMS and agpmode=-1: OK, up to me trying to play some video, then GPU lockups. * 2.6.38 with KMS and agpmode=1: GPU lockups a few seconds after X loads (it *does* show up, but locks up a few seconds latter). * 2.6.39 with KMS and agpmode=-1: Not OK, even if I don't use anything accelerated (problems with colors and software rendering). So, I am not quite sure if it would be the case of bisecting or, at least, what would be a good starting point. I can, though, try to boot with many other kernels to see if I can (provided that udev doesn't stop me). > Note that you should boot with radeon.no_wb=1 as well for OK. I can try no_wb=1 with agpmode=-1 and report back in a few moments, to see if the lockups are still there or not. > this, as CP writeback was only fixed during the 2.6.39 cycle (in commit > dc66b325f161bb651493c7d96ad44876b629cf6a). Right. Thanks for that fix of yours (just read the commit). Regards, -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. ------------------------------------------------------------------------------ What Every C/C++ and Fortran developer Should Know! Read this article and learn how Intel has extended the reach of its next-generation tools to help Windows* and Linux* C/C++ and Fortran developers boost performance applications - including clusters. http://p.sf.net/sfu/intel-dev2devmay -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
