From: Mikael Pettersson <mikpe@csd.uu.se>
To: linux-kernel@vger.kernel.org
Subject: local APIC may cause XFree86 hang
Date: Wed, 13 Nov 2002 23:29:14 +0100 [thread overview]
Message-ID: <15826.53818.621879.661253@kim.it.uu.se> (raw)
Yesterday I installed a Radeon 8500 in a box. Suddenly the box
consistently hung hard every time I tried to shut down XFree86.
It turned out to be the local APIC timer: with it enabled,
the hangs occur; with it disabled but with the rest of the
local APIC and the performance counters in use, there are no
problems at all.
Does XFree86 (its core or particular drivers) use vm86() to
invoke, possibly graphics card specific, BIOS code?
That would explain the hangs I got. The fix would be to
disable the local APIC around vm86()'s BIOS calls, just like
we now disable it before APM suspend.
Doesn't the PCI code also do BIOS calls?
/Mikael
next reply other threads:[~2002-11-13 22:22 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-13 22:29 Mikael Pettersson [this message]
2002-11-13 23:19 ` Alan Cox
2002-11-13 23:01 ` Mikael Pettersson
2002-11-13 23:52 ` Linus Torvalds
2002-11-14 7:58 ` Gregoire Favre
2002-11-14 0:29 Nakajima, Jun
2002-11-14 0:48 ` Linus Torvalds
2002-11-14 1:16 Nakajima, Jun
2002-11-14 1:38 ` Linus Torvalds
2002-11-14 8:08 ` george anzinger
2002-11-14 14:27 ` Alan Cox
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