https://bugs.freedesktop.org/show_bug.cgi?id=26891

--- Comment #31 from David L. equinox-freedesktopbugs@diac24.net 2012-08-03 23:21:21 UTC --- (In reply to comment #30)

(In reply to comment #29)

...

Is the lvds console display shifted if you don't connect any external monitor ?

So far I only got the LVDS to display anything by connecting the DP monitor, so I don't really know. I didn't try much there... I'll try some other magic incantations/plug sequences tomorrow, maybe there's a sequence to get LVDS-only with it actually showing something.

Starting X while the LVDS is off works fine, reenabling it.

Correction: I just had a hard freeze after an hour or so of X use.

Since I need to get some things done, I've booted in hybrid UEFI mode now with only the brightness patch applied. The LVDS-blank-after-insmod issue is gone, so it's not the backlight control I guess.

Also, interestingly, the power consumption of the laptop was considerably lower under UEFI native mode (24W) vs. UEFI hybrid mode (29W). Could be either the CRTC programming patch or something completely unrelated.