On ven, 2008-11-28 at 14:18 -0500, Len Brown wrote: > On Fri, 28 Nov 2008, Yves-Alexis Perez wrote: > > > I'm running linux 2.6.28-rc6-00007-ged31348 on my Thinkpad T61, with > > Intel GM965. Under X, brightness keys work fine most of the time, but in > > some case it fails (for example after a dpms force off, but not always). > > Switching to console and back to X fix the problem for a time. > > How to you invoke DPMS? xorg.conf: Section "ServerFlags" Option "StandbyTime" "0" Option "SuspendTime" "0" Option "OffTime" "5" EndSection > > I'm running the latest 2.6.28 on top of FC9, and I find that > if I use the hot keys to dim the screen all the way, > and then I'm idle for a period, the screen pretends to go black. > (X foolishly paits the pixels black, but keeps the backlight on) > Then when I touch the mouse to wake it up, my screen unlock > prompt is at full brightness, and so is my screen when I unlock. > So it seems that X forgot that I set the brightness. > (though clicking the brightness hotkey shows the widget still > thinks I'm at minimum brightness, so that part remembered...) > > Now the backlight is totally screwed up. > I use the hotkeys to get to minimum brightness, > but something thinks I'm still at maximum brightness, > because after some idle time, the screen all by itself > goes bright. Well I think that gnome-power-manager might be in your way, not sure. > > > Another weird stuff is that, in single user, I have no way to control > > the backlight. Using brightness key doesn't work, > > and /sys/class/backlight/acpi_video0 doesn't do anything. > > There are actually two text consoles -- CTRL-ALT-F1 while X is running > and single-user mode. > > The hot keys have never worked for either of these modes. Yes I know, that's why I'm asking here. They are not supposed to work atm because OpRegion needs X support. What I was asking is if there was something in cooking for that. But what puzzles me is that even the /sys/class/backlight/acpi_video0 doesn't work. > > I would hope that X (i915) should be able to handle brightness > in CTRL-ALT-F1 mode the same way that it does in GUI mode, > but that doesn't seem to be working. > > Then there is single-user-mode, where X never ran > and the i915 may not even be loaded... > > We used to have /sys/class/backlight and /proc/acpi/video > available and they used to work in single-user mode > (as well as in CTRL-ALT-F1) mode. This was due to > there being two video devices. Unfortunately, we deleted > the one what works in this scenario. > > Try this patch, which brings it back. No, I don't want to revert those patches, they are there for a reason. But yeah there is some console support missing, which may be working on. Cheers, -- Yves-Alexis
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