Re: Lenny: Flickering display with Radeon 9250 under X11
On Mon, 2008-10-06 at 21:46 +0200, Gerhard Pircher wrote:
> -------- Original-Nachricht --------
> > Datum: Mon, 06 Oct 2008 12:45:46 +0200
> > Von: "Michel Dänzer" <daenzer@debian.org>
> > An: Gerhard Pircher <gerhard_pircher@gmx.net>
> > CC: debian-powerpc@lists.debian.org
> > Betreff: Re: Lenny: Flickering display with Radeon 9250 under X11
>
> > On Sun, 2008-10-05 at 16:22 +0200, Gerhard Pircher wrote:
> > >
> > > Recently I tried out Debian Lenny on my AmigaOne G4 with a Radeon 9250.
> > > I have a LCD monitor connected to it through DVI-I. Unfortunately the X
> > > server outputs a flickering display to which the monitor can't
> > > synchronize and thus is simply black most of the time. The same hardware
> > > configuration works fine under Debian Etch, thus I guess it is a problem with
> > > the X.org radeon driver. Did anybody else experienced this problem?
> > > I also included the X.org.log file, but as far as I can tell it doesn't show any
> > > information related to this problem.
> >
> > It shows that the 1600x1200 mode has a pixel clock of 162 MHz, which is
> > close the single link DVI limit of 165 MHz. There are a couple of
> > reports of problems like this at http://bugs.freedesktop.org with
> > various suggestions for workarounds; IIRC the most workable ones come
> > down to using custom mode definitions, using either reduced blanking
> > periods or a lower refresh rate.
> Thanks for the info! I thought I had seen something like a bugreport for
> this problem before, but couldn't find it again.
The infamous one is https://bugs.freedesktop.org/show_bug.cgi?id=2859 ,
but other examples are
https://bugs.freedesktop.org/show_bug.cgi?id=13287
https://bugs.freedesktop.org/show_bug.cgi?id=14566
https://bugs.freedesktop.org/show_bug.cgi?id=16374
> > If you haven't yet, you might also want to try the driver upstream Git
> > snapshot from experimental, there have been some tweaks to the clock
> > programming code.
> Okay, I'll take a look at the experimental branch. I guess there are no
> experimental Debian packages yet or are they rebuild every day?
Not sure what you mean, but FWIW I'm talking about the packages in
Debian experimental.
> Do you think this (possible) bugfix will make it into the Lenny release?
We can worry about that if it's indeed fixed with newer versions of the
driver.
--
Earthling Michel Dänzer | http://tungstengraphics.com
Libre software enthusiast | Debian, X and DRI developer
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