[Intel-gfx] [PATCH] drm/i915: Revert i915.semaphore=1 default from 47ae63e0

[Andrew Lutomirski]

On Thu, May 19, 2011 at 3:56 PM, Keith Packard <keithp at keithp.com> wrote:
> On Fri, 13 May 2011 12:14:54 -0400, Andy Lutomirski <luto at MIT.EDU> wrote:
>
>> My Q67 / i7-2600 box has rev09 Sandy Bridge graphics.  It hangs
>> instantly when GNOME loads and it hangs so hard the reset button
>> doesn't work.  Setting i915.semaphore=0 fixes it.
>
> Can you describe precisely what hardware you have? The make and model of
> the motherboard and the exact model of CPU? I'd like to get this issue
> resolved for 2.6.40 and need to have a reliable way to reproduce the
> hang; replicating your hardware may be a good way of doing that.

Intel DQ67SW.  AMT is enabled but the port 5900 is closed (because I
can't figure out how to turn on the kvm).

The system boots from UEFI (which is buggy, both because efifb doesn't
recognize my hardware, because asking the firmware for the boot menu
causes all efivars entries to be ignored, and because unless I set
reboot=k the system crashes on reboot).

Userspace is F15 running compiz (*not* gnome-shell).

BIOS is SWQ6710H.86A.0051.2011.0413.1154.

CPU is:
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 42
model name      : Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
stepping        : 7

config and dmidecode output attached.

I'm happy to help test after Sunday.  I'm currently out of town and
busy trying to make my Sandy Bridge laptop work.  (It has a different
non-i915-related problem.)

--Andy
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