Date: Mon, 4 May 2009 20:40:27 +0200 From: Alexey Shuvaev <shuvaev@physik.uni-wuerzburg.de> To: freebsd-current@freebsd.org Cc: rnoland@FreeBSD.org Subject: intel graphics loosing msi interrupt on subsequent starts Message-ID: <20090504184027.GA19125@wep4035.physik.uni-wuerzburg.de>
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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, ...).
I can't be sure it is only due to X upgrade,
I have upgraded the base system also (~2 weeks old CURRENT -> 03.05.2009).
Some quick to gather system details:
~> uname -a
FreeBSD wep4035 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Sun May 3 03:04:41 CEST 2009 root@wep4035:/usr/obj/usr/src/sys/GENERIC amd64
(4 GB of RAM, Core2Duo, if it matters)
>From pciconf -lv:
vgapci0@pci0:0:2:0: class=0x030000 card=0x82761043 chip=0x29c28086 rev=0x02 hdr=0x00
vendor = 'Intel Corporation'
device = '(Bearlake) Integrated Graphics Controller'
class = display
subclass = VGA
>From dmesg with hw.pci.enable_msi="0":
vgapci0: <VGA-compatible display> port 0xbc00-0xbc07 mem 0xfe980000-0xfe9fffff,0xd0000000-0xdfffffff,0xfe800000-0xfe8fffff irq 16 at device 2.0 on pci0
agp0: <Intel G33 SVGA controller> on vgapci0
agp0: detected 7164k stolen memory
agp0: aperture size is 256M
drm0: <Intel G33> on vgapci0
vgapci0: child drm0 requested pci_enable_busmaster
info: [drm] AGP at 0xd0000000 256MB
info: [drm] Initialized i915 1.6.0 20080730
>From dmesg with default settings:
vgapci0: <VGA-compatible display> port 0xbc00-0xbc07 mem 0xfe980000-0xfe9fffff,0xd0000000-0xdfffffff,0xfe800000-0xfe8fffff irq 16 at device 2.0 on pci0
agp0: <Intel G33 SVGA controller> on vgapci0
agp0: detected 7164k stolen memory
agp0: aperture size is 256M
drm0: <Intel G33> on vgapci0
info: [drm] MSI enabled 1 message(s)
vgapci0: child drm0 requested pci_enable_busmaster
info: [drm] AGP at 0xd0000000 256MB
info: [drm] Initialized i915 1.6.0 20080730
Thanks,
Alexey.
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