On Mon, Apr 18, 2011 at 11:29 AM, Jerome Glisse <j.glisse@xxxxxxxxx> wrote: > On Mon, Apr 18, 2011 at 11:23 AM, Alex Deucher <alexdeucher@xxxxxxxxx> wrote: >> On Sun, Apr 17, 2011 at 10:09 AM, Joerg Roedel <joro@xxxxxxxxxx> wrote: >>> On Sat, Apr 16, 2011 at 02:54:04PM -0400, Jerome Glisse wrote: >>> >>>> If you want to go the printk way you can add printk before each test >>>> ring_test, ib_test in r600.c this 2 functions are the own that might >>>> trigger the first GPU gart activities. >>> >>> Okay, I found the place in source that triggers this. It happens in the >>> function r600_ib_test. The interesting thing is that not the ib-command >>> itself is responsible but the fence that is emitted afterwards (proved >>> by removing the fence command, where the problem went away). >>> I don't know enough about the command semantics to make a guess what >>> goes wrong there. But maybe you GPU folks have an idea? >>> >> >> I can't think of anything off hand. It might be worth disabling the >> call to r600_ib_test() in r600_init() and then seeing if you get any >> errors when the fences are used later on when X starts or just at that >> point in the module load sequence. What's odd is that when you tested >> radeon.no_wb=1 you got the same behavior as that disables shadowing of >> fence writes to gpu gart mem, so it wouldn't be writing to memory in >> that case. >> >> Alex >> > > It might be the irq ring write that is faulty. That's disabled with no_wb=1 as well. Alex > > Cheers, > Jerome > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
