xrandr does not work properly with radeon driver

[王强]

Hi all:

      I am using Ubuntu 9.04 and a laptop of Thinkpad T60 with Mobility
Radeon X1300. I found that for some kind of monitor, when I connect an
external monitor and run xrandr --auto,nothing happen.

What I do is:

disconnect external monitor, reboot the system(check Xorg.0.afterboot), run
xrandr --verbose (check xrandr.afterboot). Then I connect external monitor
to the CRT port(check Xorg.0.after_connect_crt), and run xrandr --verbose
again(check xrandr.after_connect_crt), it says VGA disconnected.

then I run xrandr --auto(check Xorg.0.after_call_xrandr_auto and
xrandr.after_call_xrandr_auto), nothing happen.

This seems only happen on old CRT monitor, if I plug another external LCD
monitor,everything works fine(check Xorg.0.log.new_monitor* and
xrandr.newmoitor*).


$ lspci | grep "VGA"
01:00.0 VGA compatible controller: ATI Technologies Inc M52 [Mobility Radeon
X1300]

$ lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu jaunty (development branch)
Release:    9.04
Codename:    jaunty

$ uname -r
2.6.28-10-generic

There is no xorg.conf, I just let ubuntu auto detect the device and monitor.

Is this a bug? or do I have any other way to switch to my external VGA when
using radeon driver?

thanks a lot.
-- 
BR
wesley.wang
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