Messages in this thread | | | Date | Tue, 19 Aug 2008 16:19:44 +0200 | From | Rene Herman <> | Subject | Re: AGP and PAT (induced?) problem (on AMD family 6) |
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On 19-08-08 12:26, Ingo Molnar wrote:
> * Rene Herman <rene.herman@keyaccess.nl> wrote: > >> On 15-08-08 17:24, Rene Herman wrote: >> >>> On 15-08-08 16:22, Ingo Molnar wrote: >>> >>>> (more people Cc:-ed) >>> Thank you. Additional information at http://lkml.org/lkml/2008/8/6/449 >>> >>>> agreed - +12 seconds wait suggest some rather fundamental breakage. >>>> Did we go back to uncached for some critical display area that makes >>>> X start up (shut down) that slowly? Did we mark the BIOS uncacheable >>>> perhaps, causing X to execute BIOS code very slowly? >>> Quite a lot "uncached-minus" in those lists. I am desperately trying to >>> avoid a clue about mostly anything graphics related so, "I dunno". >>> >>> I haven't just disabled PAT yet (although I was about to just do so) >>> and am available for testing. >> <waiting with bated breath> >> >> Additional observation with respect to first,next shutdown: >> >> With Option "AGPSize" "64", and booted with "nopat", X startup (from >> startx<enter> to functional desktop) is approximately 5 seconds, >> shutdown is 1 second as calibration times. >> >> Booted without "nopat", X startup seems to alternate between 10+ and >> 16+ seconds and for shutdown -- the first shutdown after boot takes >> some 14 seconds total, subsequent shutdowns settle at around 5 >> seconds. > > would it be possible to start up and shut down X in the slow case via > strace, by doing something like this: > > strace -f -ttt -TTT -o trace.log startx > > and see which system calls (or other activities) took suspiciously long?
It wouldn't it seems. Root X (needed for the strace) works fine but started this way hangs indefinitely.
I believe the 14 seconds for first shutdown to 5 later might be telling. Sounds like something might have fixed up uncached entries.
I'd really like a reply from the AGP or PAT side right about now.
Rene.
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