Hello,
I tried playing with xrandr transforms on my 1280x1024 screen.
Intention: simulate a lower-resolution screen, add black bars, keep
aspect ratio. Result: first it worked, then gave X errors. Also with the
non-identity transform, in GTK menus, when selecting a menu item, it is
not fully painted in blue initially (looks like a tiling artifact), this
corrects itself in half a second or so.
I am using Gentoo ~amd64, xorg-server-1.8.0, xf86-video-intel-2.11.0,
mesa-7.8.1, linux-2.6.33-gentoo-r2 (contains upstream 2.6.33.3). Here is
what I did:
a...@home ~ $ xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
VGA1 disconnected (normal left inverted right x axis y axis)
DVI1 connected 1280x1024+0+0 (normal left inverted right x axis y axis)
338mm x 270mm
1280x1024 60.0*+ 75.0
1280x960 60.0
1152x864 75.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
720x400 70.1
a...@home ~ $ xrandr --fb 1024x768 --output DVI1 --transform
1,0,128,0,1,128,0,0,1
xrandr: specified screen 1024x768 not large enough for output DVI1
(1280x1024+128+128)
a...@home ~ $ xrandr --fb 1024x768 --output DVI1 --transform
1,0,-128,0,1,-128,0,0,1
xrandr: specified screen 1024x768 not large enough for output DVI1
(1280x1024+-128+-128)
a...@home ~ $ xrandr --fb 1280x960 --output DVI1 --transform
1,0,0,0,1,-32,0,0,1
xrandr: specified screen 1280x960 not large enough for output DVI1
(1280x1024+0+-32)
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 149 (RANDR)
Minor opcode of failed request: 7 (RRSetScreenSize)
Serial number of failed request: 24
Current serial number in output stream: 26
a...@home ~ $ xrandr --fb 1280x960 --output DVI1 --transform
1,0,0,0,1,-32,0,0,1
xrandr: specified screen 1280x960 not large enough for output DVI1
(1280x1024+0+-32)
a...@home ~ $ xrandr --auto
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 149 (RANDR)
Minor opcode of failed request: 7 (RRSetScreenSize)
Serial number of failed request: 24
Current serial number in output stream: 26
a...@home ~ $ xrandr --auto
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 149 (RANDR)
Minor opcode of failed request: 7 (RRSetScreenSize)
Serial number of failed request: 24
Current serial number in output stream: 26
a...@home ~ $ xrandr --output DVI1 --auto
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 149 (RANDR)
Minor opcode of failed request: 7 (RRSetScreenSize)
Serial number of failed request: 24
Current serial number in output stream: 25
--
Alexander E. Patrakov
_______________________________________________
xorg@lists.freedesktop.org: X.Org support
Archives: http://lists.freedesktop.org/archives/xorg
Info: http://lists.freedesktop.org/mailman/listinfo/xorg
