Red Hat Bugzilla – Bug 114914
xrandr gives peculiar results on a trident cyberblade.
Last modified: 2007-11-30 17:10:35 EST
Description of problem:
When playing with xrandr -s and the available screen sizes, I
found that switching from one particular one to another resulted
in a messed up screen: it was as though it drew the whole thing
onto the left-hand half of the screen and then repeated a section
of that several times to the right. So that if I moved my mouse
over to the right, I would see several cursors moving in sync.
Switching to a virtual text console and back cures it. Switching
to a different size as an intermittent stage stops it happening.
Version-Release number of selected component (if applicable):
How reproducible: every time on this machine.
SZ: Pixels Physical Refresh
*0 1280 x 1024 ( 342mm x 271mm ) *60
1 1280 x 960 ( 342mm x 271mm ) 60
2 1152 x 864 ( 342mm x 271mm ) 75
3 1024 x 768 ( 342mm x 271mm ) 75 70 60
4 800 x 600 ( 342mm x 271mm ) 75 72 60 56
5 640 x 480 ( 342mm x 271mm ) 75 72 60
6 1152 x 768 ( 342mm x 271mm ) 54
7 832 x 624 ( 342mm x 271mm ) 74
Current rotation - normal
Current reflection - none
Rotations possible - normal
Reflections possible - none
$ xrandr -s 5
$ randr -s 0
That's it. Does it every time for me. Going from 1 to 0 does not cause it.
I can play around with more "if I go from here to here to here"
if it helps. 5 is fine, incidentally. It's the move from 5 to 0 which
Monitor is a Dell LCD which does up to 1280x1024.
Video card is a Trident CyberBlade.
I have seen this problem also.
In my case it was switching from 1024x768 to 640x480 that messed up
the screen. The problem remained even when I switched back to
1024x768 but now there were several "stripes" with repeated content.
1. Screen from (0,0)-(127,768)
2. Black area from (128,0)-(255,768)
3. Screen from (256,0)-(383,768) [same contents as in 1]
2. Black area from (384,0)-(512,768)
I am not sure about 128, 256, 384, 512 limits. These are just
estimated values (and easier to count with).
With the new xorg release available (xorg-x11-6.7.0-2) I can no
longer reproduce the problem. I've tried changing resolutions back
and forth between the available resolutiuons without noticing any
This could be related to bug #120950 perhaps. That's the only thing
that's changed that might affect this that I can think of off the
top of my head.
Telsa, can you test the current FC2 bits and let me know if this issue
is still reproduceable, or wether it's resolved now?
Thanks in advance,
Assuming the problem is fixed now for everyone in Fedora Core 2,
as per comment #2 above. Please reopen if problem returns.
Setting status to "CURRENTRELEASE" of FC2.