Public bug reported:
System>Preferences>Screen Resolution shows two displays, with extended
desktop, but right monitor (DVI-0) remains black.
This is xserver-xorg-video-radeon 6.9.0+git20080826.a3cc1d7a-2ubuntu3
from Intrepid Ibex beta on x86_64: a Dell Optiplex 755 with a Radeon HD
2400 XT; X is using the "radeon" driver. I have two identical Dell 20"
LCD monitors. During boot, both work. I have had some success with the
proprietary driver in an earlier release of Ubuntu but there was no
RandR support.
If I use xrandr to turn off that output and then --auto to re-enable it,
I can just make out the backlight of the monitor turning off and on. The
gdm desktop resizes as expected (3200x1200 -> 1600x1200).
(You have to excuse if there are any typos, I am typing this in as the
e1000e driver is disabled).
# xrandr --verbose -q
Screen 0: minimum 320 x 200, current 3200 x 1200, maximum 3200 x 1600
DVI-1 connected 1600x1200+0+0 (0x3d) normal (normal left inverted right x axis
y axis) 367mm x 275mm
Idnetifier: 0x3b
Timestamp: 26156
Subpixel: horizontal rgb
Clones: DVI-0
CRTC: 0
CRTCs: ) !
EDID_DATA: ...
dvi_monitor_type: auto
scaler: off
tmds_pll: bios
load_detection: 1 (0x1) range: (0,1)
1600x1200 (0x3d) 162.0MHz +HSync +VSync *current +preferred
h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 75.0KHz
v: height 1200 start 1201 end 1204 total 1250 clock 60.0Hz
...
DVI-0 connected 1600x1200+1600+0 (0x3d) normal (normal left inverted right x
axis y axis) 367mm x 275mm
Identifer: 0x3c
Timestamp: 26156
Subpixel: horizontal rgb
Clones: DVI-1
CRTC: 1
CRTCs: 0 1
** Affects: xserver-xorg-video-ati (Ubuntu)
Importance: Undecided
Status: New
--
no image on enabled display (Radeon HD 2400 XT)
https://bugs.launchpad.net/bugs/280391
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
