RANDR with Radeon 9200SE
Well, today I tried to configure my Xorg to make use of the second TFT display on my desk. Sadly enough, it didn't work out as expected: just plug it to the second port (VGA) of the ATI Radeon 9200SE card and configure the display with krandtray. All I got is a black display and a xrandr stating that the display is not connected:
[code][ij@muaddib:]~$ xrandr -q
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 1680 x 1680
VGA-0 disconnected (normal left inverted right x axis y axis)
DVI-0 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 433mm x 271mm
1680x1050 60.0*+ 59.9
1280x1024 75.0 60.0
1280x960 60.0
1152x864 75.0
1024x768 75.0 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 75.0 72.8 66.7 59.9
720x400 70.1
S-video disconnected (normal left inverted right x axis y axis)[/code]
lspci reports this:
[code]01:00.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200 SE] (rev 01)
01:00.1 Display controller: ATI Technologies Inc RV280 [Radeon 9200 SE] (Secondary) (rev 01)[/code]
The primary display is a Samsung TFT with 1680x1080 hooked up by a DVI cable. The secondary display is connected by a standard VGA cable and is a HP L1925 TFT with 1280x1024. I'm using Debian Sid/unstable anyway...
Dear Lazyweb, is there anything I'm missing? I tried several tips from Google & Co, but that didn't work as well. So, I'm a little bit stuck here and would appreciate some hints, tips or even config snippets... :-)
UPDATE:
After a shutdown of the machine and powering it on again, the second display shows up, but currently Xorg chooses the wrong display as primary and is cloning both displays instead of extending the Samsung to the left on the HP display. Will have to deal with that later...
Did you add a "Virtual" Option to your xorg.conf? Currently Xorg isn't able to resize its framebuffer on demand, so you have to tell Xorg the maximum size of the framebuffer for the case that both monitors are enabled at startup time!
Yes, I rebooted the system several times with several different kernels. It still didn't show up unless I actually powered down the machine and took a look on the card whether there is some jumper or so. After booting up again, the system recognized the second attached monitor and now it works to some degree: it's still opening its primary display on the wrong monitor and such, but it is basically working now.
Sounds to me like a BIOS problem. BIOS modesetting on many systems has the silly limitation that you have to have had the monitor connected when the system boots.
The solution: get a version of the Xorg ATI driver sufficiently new that it no longer relies on BIOS modesetting.
Ne, das Kabel ist in Ordnung... es tut prinzipiell an dem Monitor mit einem anderen Rechner. Auch der VGA-Ausgang tat problemlos einzelnen in pre-DVI Zeiten...
System ist sowieso Sid...
Ist das VGA-Kabel voll bestückt? Soweit ich weiß, fehlen älteren Kabeln einige Adern die zum Übermitteln von Konfigurationsinfos benutzt werden, siehe http://de.wikipedia.org/wiki/VGA_(Anschluss)
Vllt. erkennt Xrandr deswegen deinen Bildschirm einfach nicht.
Und zur Not: X-Server und Xrandr aus Sid probiert?
Yes, in the meanwhile I added a Virtual option to the config. The real problem was, though, that the second port didn't show up as connected. After I solved that problem, it was all just a config problem...