ubuntu-x-swat team mailing list archive

[Geir Ove Myhr <gomyhr@xxxxxxxxx>]

I have a theory as for why acpi=off works, but not nomodeset or "DRI"
"off". As far as I remember, the xorg.conf option "DRI" "off" is
ignored when KMS is used (cf. comment # 6, DRI is responsible for KMS,
so it does not make sense to turn it off). So what acpi=off does is
probably to disable DRI, and therefore also disable KMS. If this
theory is right, using the kernel option nomodeset AND having Option
"DRI" "off" in xorg.conf will stop the freezes.

Could you check if this is the case? To understand better what is
happening with acpi=off, it would be nice to have /var/log/Xorg.0.log
for both the case acpi=off (without xorg.conf) and the case nomodeset
with Option "DRI" "off" in xorg.conf.

> i don't try because ignoreby drivers version > 2.8 :
> Option "AccelMethod" "xxx" - Try "XAA", "EXA" (ignored on -intel > 2.8.0)
> Option "Accel" "Off" - turns off the 2D acceleration (ignored on -intel except for i810 and i815 chipsets)

Yes, I added those comments recently so that people with intel
wouldn't try those options to no avail. I guess I should also add that
the DRI option is ignored when KMS is used once we have verified that.

-- 
[i855] Karmic / i855GM / Fujistu Siemens Amilo M7400 :  Freeze shortly after X startup on Intel i855
https://bugs.launchpad.net/bugs/477972
You received this bug notification because you are a member of Ubuntu-X,
which is the registrant for xf86-video-intel.