Bug#522226: xserver-xorg-video-intel: screen briefly flashes/flickers a few times an hour

[Sanjoy Mahajan <sanjoy@MIT.EDU>]

> Don't use make install. Just copy src/.libs/intel.so into
> /usr/lib/xorg/modules/drivers/ (after having moved the old intel.so
> from there).

Great, that's a much simpler recipe.  I did that and restarted the X
server (with just one server), and got this in the log

(II) LoadModule: "intel"
(II) Loading /usr/lib/xorg/modules/drivers//intel_drv.so
dlopen: /usr/lib/xorg/modules/drivers//intel_drv.so: undefined symbol: PictureScreenPrivateKey
(EE) Failed to load /usr/lib/xorg/modules/drivers//intel_drv.so
(II) UnloadModule: "intel"
(EE) Failed to load module "intel" (loader failed, 7)

Perhaps I compiled against incompatible header files?

But, the good news is that in looking at that log file, I noticed i810
being loaded.  My xorg.conf (until 2 days ago) had the i810 and
PCI:0:2:0 lines commented in (see snippet below).  I think those lines
were needed long ago, and got inherited.  When I commented out those two
lines, and returned to the intel 2.3.2 driver, the flicker seems to have
gone away.  I'll keep watching for it and report if I see it return.

Section "Device"
	Identifier	"Intel Corporation Mobile Integrated Graphics Controller"
#	Driver		"i810"
#	BusID		"PCI:0:2:0"
  Option "MonitorLayout" "CRT,LFP"
  Option "Clone" "true"
  Option "DevicePresence" "true"
EndSection