Bug#689268: Intel HD 4000 (Ivy Bridge) graphics freeze
On 2012-10-18 12:37, Ingo wrote:
Per,
I am still watching this issue for interest (my case I do consider as
"wrong" BIOS setting which solved it for me).
Hmm, BIOS you said. I just check my BIOS version and found that the MB
was delivered with the initial BIOS version from February. Since then
ASUS have release five versions, all with "Improve system stability"
among the few lines in the changelog.
Now I'm on the latest BIOS (from August) and back on the 3.2.0 kernel.
To my knowledge mtrr's are still used (not by i915 as Ben Hutchings
stated) and probably here certain manufacturers of boards/BIOS probably
set up different configurations.
Probably it ist worth to try this kernel parameter with Wheezy's
standard kernel:
"enable_mtrr_cleanup"
to allow kernel to re-arrange them and see if it has any influence in
your case?
I will try that if I get another freeze, and if that also fails, try the
vesa driver, and then work my way up in the kernel versions as suggested
by Jonathan.
I noticed something strange with allocation of GPU RAM. In the old BIOS,
the default was 64 MB, but in the new bios, "Auto" was default. So I set
it explicitly to 64 MB. However, this is what the OS reports:
# lspci -vv
...
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen
Core processor Graphics Controller (rev 09) (prog-if 00 [VGA controller])
...
Region 0: Memory at f7800000 (64-bit, non-prefetchable) [size=4M]
Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
...
# dmesg | grep aperture
[ 0.000000] Checking aperture...
[ 1.644376] agpgart-intel 0000:00:00.0: AGP aperture is 256M @ 0xe0000000
# grep -i mem /var/log/Xorg.0.log
[ 18.557] (--) PCI:*(0:0:2:0) 8086:0162:1043:84ca rev 9, Mem @
0xf7800000/4194304, 0xe0000000/268435456, I/O @ 0x0000f000/64
(268435456 is 256*1024*1024.)
I also found this ubuntu bug report: "lspci reports wrong video memory
size" (https://bugs.launchpad.net/ubuntu/+source/pciutils/+bug/607991).
Could the same thing that fools lspci also make the kernel and the i915
driver think I have more GPU memory than I actually have? On the other
hand, the last freeze I had was with 256 MB configured in bios.
*UPDATE*
BIOS update did no good. Just had a freeze while typing this email. It
only took minutes from reboot, and the trigger this time was
doubleclicking the URI in firefox in an attempt to copy the launchpad
link above.
Now I'm back up with 256 MB GPU RAM, still on the vanilla wheezy kernel.
The output from lspci/dmesg/Xorg.0.log looks exactly the same as with 64
MB. Strange.
/Per
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