Bug#607767: Blank screen on starting X with Dual 2 GHz G5 and X800XT; DRM module not loading for radeon driver
On Mit, 2011-01-05 at 16:43 -0500, dpickett wrote:
> On Jan 5, 2011, at 9:53 AM, Michel Dänzer wrote:
>
> > On Die, 2011-01-04 at 14:35 -0500, dpickett wrote:
> >> The monitor does not go blank: it loses signal as the entire machine
> >> locks up. After starting X, I see a brief flash of text, then the
> >> monitor flashes "no signal" and the entire machine locks up. An ssh
> >> session on another machine is locked up, and I can not ping the Linux
> >> machine. The only way to bring it back it a hard reset.
> >
> > So it's changed again from not freezing to freezing? :(
>
> Yes: it's as if the machine is throwing random errors just to be difficult. :(
>
> So, I decided on a new tack: I booted without an xorg.conf file, and it _almost_ works. It looks like the card is detected properly and drm is loading. The machine doesn't freeze, and I get a corrupted desktop. There's a black screen, and a corrupted mouse cursor I can move around.
>
> So, I installed a minimal xorg.conf file and attempted to fix the screen problems. Unfortunately, I couldn't, but it looks like we're very close. The problem seems to be that X is having problems getting proper screen info. The error I'm seeing on my monitor (which as 1680x1050) is "vrefresh out of range". There's also an "unhandled monitor" message.
>
> If it helps, output for "cvt 1680x1050" is: # 1680x1050 59.95 Hz (CVT 1.76MA) hsync: 65.29 kHz; pclk: 146.25 MHz
> Modeline "1680x1050_60.00" 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync
[...]
> Section "Monitor"
> Identifier "Monitor0"
> VendorName "Viewsonic"
> ModelName "VG2030WM"
> Modeline "1680x1050_60.00" 146.25 1680 1784 1960 2240
> 1050 1053 1059 1089
> HorizSync 65.29
> VertRefresh 55-65
> Option "DPMS"
> EndSection
>
> Section "Screen"
> Identifier "Screen0"
> Monitor "Monitor0"
> DefaultColorDepth 24
> SubSection "Display"
> Viewport 0 0
> Depth 24
> Modes "1680x1050"
> EndSubSection
> EndSection
FWIW, if you want to use your custom modeline, you need to reference its
actual name in SubSection "Display".
--
Earthling Michel Dänzer | http://www.vmware.com
Libre software enthusiast | Debian, X and DRI developer
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