Red Hat Bugzilla – Bug 502688
The dual head does not work on Thinkpad 200s laptop with GMA4500MHD if KMS enabled
Last modified: 2018-04-11 04:09:50 EDT
Created attachment 345544 [details]
Description of problem:
First Plugin the display in the VGA socket of the laptop.
When KMS is enabled, I use graphics "display preference" to set the dual head. It gives an error "The selected configuration could not be found"
If I use :
xrandr --output LVDS1 --left-of VGA1
It does not do anything. Only the VGA display is on and the laptop's LVDS display is off not even mirror the VGA's display.
If I use
xrandr --output LVDS1 --auto
It says: xrandr: cannot find crtc for output LVDS1
Here is my xrandr info:
Screen 0: minimum 320 x 200, current 1440 x 900, maximum 8192 x 8192
VGA1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 410mm x 256mm
1024x768 75.1 70.1 60.0
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
LVDS1 connected (normal left inverted right x axis y axis)
DVI1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
DVI2 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
When I turn off the KMS. It is working as normal.
Version-Release number of selected component (if applicable):
Try to get dual head on
Steps to Reproduce:
The dual happend should be on as normal
I have no xorg.conf
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle.
Changing version to '11'.
More information and reason for this action is here:
Since this bugzilla report was filed, there have been several major updates in various components of the Xorg system, which may have resolved this issue. Users who have experienced this problem are encouraged to upgrade their system to the latest version of their packages. For packages from updates-testing repository you can use command
yum upgrade --enablerepo='*-updates-testing'
Alternatively, you can also try to test whether this bug is reproducible with the upcoming Fedora 12 distribution by downloading LiveMedia of F12 Beta available at http://alt.fedoraproject.org/pub/alt/nightly-composes/ . By using that you get all the latest packages without need to install anything on your computer. For more information on using LiveMedia take a look at https://fedoraproject.org/wiki/FedoraLiveCD .
Please, if you experience this problem on the up-to-date system, let us now in the comment for this bug, or whether the upgraded system works for you.
If you won't be able to reply in one month, I will have to close this bug as INSUFFICIENT_DATA. Thank you.
[This is a bulk message for all open Fedora Rawhide Xorg-related bugs. I'm adding myself to the CC list for each bug, so I'll see any comments you make after this and do my best to make sure every issue gets proper attention.]
I'm having a similar issue on up to date F11 on X200s, it's just another way around.
If I try to enable external display with
xrandr --auto OR xrandr --output VGA1 --auto
the result is:
xrandr: cannot find crtc for output VGA1
The workaround is to run these commands first.
jadetukka:~$ xrandr --output DVI1 --off
jadetukka:~$ xrandr --output DVI2 --off
After those I can use xrandr to enable external display in the normal way.
My xrandr output just in case (when I've done steps mentioned above):
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
VGA1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 298mm
800x600 60.3 56.2
LVDS1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 261mm x 163mm
DVI1 connected (normal left inverted right x axis y axis)
DVI2 connected (normal left inverted right x axis y axis)
Reporter, any comments on comment 4, please?
My problems disappeared after upgrading to F12
Same for me, F12 solved the issue, on x86_64 for me.
Thank you for letting us know.