Date: Tue, 5 May 2009 00:31:48 +0200 From: Alexey Shuvaev <shuvaev@physik.uni-wuerzburg.de> To: Robert Noland <rnoland@FreeBSD.org> Cc: freebsd-current@freebsd.org Subject: Re: intel graphics loosing msi interrupt on subsequent starts Message-ID: <20090504223148.GA1659@wep4035.physik.uni-wuerzburg.de> In-Reply-To: <1241463941.1788.31.camel@balrog.2hip.net> References: <20090504184027.GA19125@wep4035.physik.uni-wuerzburg.de> <1241463941.1788.31.camel@balrog.2hip.net>
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On Mon, May 04, 2009 at 02:05:41PM -0500, Robert Noland wrote: > On Mon, 2009-05-04 at 20:40 +0200, Alexey Shuvaev wrote: > > Hello all! > > > > Sorry if it is already reported... > > > > I have recently upgaded X server from 1.4 to 1.6 > > (ports from ~23.01.2009 -> 03.05.2009). > > On the first start everything works ok (including [glx]gears). > > On the second and subsequent starts everything looks working but jerky, > > I need to move mouse around to get some windows redrawn, > > [glx]gears print warning message about not getting vblank interrupts > > and outputs something about 1-2 frames per 5 seconds. > > > > The inspectation with vmstat -i has shown that the card generates > > interrupts only during the first start of X server. > > > > If I set hw.pci.enable_msi="0" everything is working fine (start X server > > multiple times, switch consoles, [glx]gears, number of irq16-s > > is increasing, ...). > > irq16 is likely shared, so this may or may not be true... At least in > some cases, I was seeing the interrupt handler processing events when > some other device on the shared interrupt fired. Interrupts on Intel > have been a real pain. There is a drm specific tuneable for disabling > msi hw.drm.msi=0. I have a patch which I'm currently using on my g45 > that overhauls the way that we handle interrupts. > > http://people.freebsd.org/~rnoland/drm-intel-050209.patch > > Reports have been mixed with this, but it is working for me... > So far works for me too... irq256: vgapci0 7759 21 Thanks! :) Alexey.
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