From: Christof Petig <lists@petig-baender•de>
To: Frank Murphy <murphyf+xfree86@f-m•fm>
Cc: linuxppc-dev@ozlabs•org, debian-x@lists•debian.org
Subject: Re: G3 iBook LCD brightness in X under kernel 2.4.25 and 2.6.8
Date: Fri, 26 Nov 2004 11:28:55 +0100 [thread overview]
Message-ID: <41A70567.8050000@petig-baender.de> (raw)
In-Reply-To: <200411232008.16854.murphyf+xfree86@f-m.fm>
Frank Murphy schrieb:
> I'm trying to migrate from a 2.4 to a 2.6 kernel, but I have one last problem
> keeping me with 2.4.25. There's a problem with adjusting screen brightness
> under X (4.3.0.dfsg.1-8).
>
> I'm running pbbuttonsd 0.6.6-2 with gtkpbbuttons 0.6.4-3 (which are tools that
> enable the LCD to be dimmed and brightened with keyboard pressed). When I'm
> running the Debian kernel-image 2.4.25-8 and I press the brightness up or
> down keys, I get the on-screen indication from gtkpbbuttons and the LCD dims
> or brightens as expected in both X and on the console. However, when I boot
> into kernel-image 2.6.8-6 or 2.6.9-1 and press the brightness keys, I get the
> on-screen indication in X, but the LCD doesn't change brightness. However, if
> I switch to a VT with a console, the brightness changes to what I tried to
> change it to. Also, pressing the brightness buttons works fine when I press
> them while in the console.
>
> My video card is a Mach64, and I'm using the 'ati' driver for X. One guess I
> have is that in 2.6, lots more things are built as kernel modules. I'd like
> to try build any needed video stuff in, but I don't know what it could be.
> Does anyone here have an idea what controls screen brightness in X?
Your mouse pointer might get some noisy spots on brightness change, ever
noticed? I would blame the kernel first (since 2.4 works well).
> The reason this is important for me is that the LCD is not dimmed when I close
> the lid for sleep, which kind of ruins the point of sleep.
>
> Does anyone have an idea of what else I need to do to get screen dimming to
> work under X with Linux 2.6?
Try to ask on the ppc-kernel list (CCed). I suspect that nobody has
reimplemented power management for mach64 in 2.6. The fact that lid
closing does not put the display to sleep keeps me locked in 2.4, too
(though I experienced that 2.6 is way faster).
I played with the thought of fixing it myself (like I plan to fix DRI
DMA some time) but was unable to allocate ressources (and enough motivation)
So take this as a "I have the problem, too" posting
Christof
next parent reply other threads:[~2004-11-26 10:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200411232008.16854.murphyf+xfree86@f-m.fm>
2004-11-26 10:28 ` Christof Petig [this message]
2004-11-26 15:38 ` G3 iBook LCD brightness in X under kernel 2.4.25 and 2.6.8 murphyf+xfree86
2004-11-27 1:02 ` Benjamin Herrenschmidt
2004-11-27 8:48 ` Frank Murphy
2004-11-28 1:58 ` Benjamin Herrenschmidt
2004-11-28 20:14 ` Frank Murphy
2004-11-28 20:39 ` Benjamin Herrenschmidt
2004-11-29 9:42 ` Frank Murphy
2004-11-29 17:17 ` Christof Petig
2004-11-30 8:02 ` Christof Petig
2004-11-30 9:05 ` Frank Murphy
2004-12-01 8:25 ` murphyf+xfree86
2004-11-29 21:56 ` Benjamin Herrenschmidt
2004-11-29 0:45 ` Christof Petig
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