Date: Fri, 5 Sep 2008 17:15:51 +0200 From: Ewald Jenisch <a@jenisch.at> To: Ewald Jenisch <a@jenisch.at> Cc: freebsd-x11@freebsd.org Subject: Re: ATI Radeon 2400XT - screen goes blank Message-ID: <20080905151551.GB2973@aurora.oekb.co.at> In-Reply-To: <20080905083208.GA2973@aurora.oekb.co.at> References: <20080904142730.GA7078@aurora.oekb.co.at> <200809041158.01059.adamk@voicenet.com> <20080905083208.GA2973@aurora.oekb.co.at>
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On Fri, Sep 05, 2008 at 10:32:08AM +0200, Ewald Jenisch wrote:
>
> In the meantime in /var/log/Xorg.0.log I found a warning saying
>
> (--) RADEON(0): Chipset: "ATI Radeon HD 2400 XT" (ChipID = 0x94c1)
> (WW) RADEON(0): R600 support is mostly incomplete and very experimental
>
> Could it be that I'm running in a bug here?
>
> How to I disable R600 support?
>
> Is there any other driver I could use?
>
> How about VESA or ATI (just to get something going in the beginning)?
>
Hi,
After spending some hours with this problem I've finally figured a
workaround which I'm posting here, maybe others running into the same
problem will benefit from it:
First I switched from the radeon to the vesa driver by changing
Driver "radeon"
to
Driver "vesa"
in xorg.conf.
Next I commented out all "Modeline" and "Modes" I've had in my
xorg.conf
Using that setting I was able to get some reasonable values for
"Modeline" from/var/log/Xorg.0.log like so:
(II) VESA(0): EDID vendor "HSD", prod id 3270
(II) VESA(0): Using EDID range info for horizontal sync
(II) VESA(0): Using EDID range info for vertical refresh
(II) VESA(0): Printing DDC gathered Modelines:
(II) VESA(0): Modeline "1280x1024"x0.0 108.00 1280 1328 1440 1688 1024 1025 1028 1066 +hsync +vsync (64.0 kHz)
...
(II) VESA(0): Modeline "1280x1024"x0.0 135.00 1280 1296 1440 1688 1024 1025 1028 1066 +hsync +vsync (80.0 kHz)
...
(II) VESA(0): Modeline "1280x1024"x59.9 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync (63.7 kHz)
The next step was to modify xorg.conf by including the Modelines into
the "Monitor"-section:
ModeLine "DCC-from-Monitor" 108.0 1280 1328 1440 1688 1024 1025 1028 1066 +hsync +vsync
ModeLine "1280x1024-135" 135.00 1280 1296 1440 1688 1024 1025 1028 1066 +hsync +vsync
ModeLine "1280x1024-109" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync
and putting one of them under Subsction Display in the Screen section
of xorg.conf.
This got me going with 1280x1024.
To cross-check I've tried to re-enable the radeon-driver (i.e. replace
'Driver "vesa"' by 'Driver "radeon").
With nothing else changed this again brought a blank screen and a "Out
of Range" like indicated in my first email.
Together with the warning from the radeon-driver in Xorg.0.log
(--) RADEON(0): Chipset: "ATI Radeon HD 2400 XT" (ChipID = 0x94c1)
(WW) RADEON(0): R600 support is mostly incomplete and very experimental
this makes we wonder whether support for the Radeon HD 2400 XT isn't
fully there yet?
Kind regards,
-ewald
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