I'm getting the same problem Chris mentions above on live installs.
There is a static on screen (it feels to me like the refresh rate is off
by a fraction). I can't seem to set coherent mode on LVDS using xrandr.
Note that I'm also using a studio 15 with the HD 3400. Output of xrandr
--prop
set...@studio15:~$ xrandr --prop
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 8192 x 8192
VGA-0 disconnected (normal left inverted right x axis y axis)
load detection: 1 (0x00000001) range: (0,1)
LVDS connected 1920x1200+0+0 (normal left inverted right x axis y axis) 331mm x
207mm
EDID:
00ffffffffffff004ca3435400000000
00120103902115780a87f594574f8c27
27505400000001010101010101010101
0101010101017241805871b021406420
26004bcf1000001a7241805871b02140
642026004bcf1000001a000000fe0058
583035358131353443540a20000000fe
00000000000000000002010a20200079
scaling mode: Full
supported: None Full Center Full aspect
1920x1200 60.0*+
1920x1080 60.0
1600x1200 59.9
1680x1050 60.0
1400x1050 60.0
1280x1024 59.9
1440x900 59.9
1280x960 59.9
1280x854 59.9
1280x800 59.8
1280x720 59.9
1152x768 59.8
1024x768 59.9
800x600 59.9
848x480 59.7
720x480 59.7
640x480 59.4
HDMI-0 disconnected (normal left inverted right x axis y axis)
coherent: 1 (0x00000001) range: (0,1)
set...@studio15:~$
** Changed in: xserver-xorg-video-ati (Ubuntu)
Status: Fix Released => In Progress
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[RV530] Screen "static noise" using high resolutions
https://bugs.launchpad.net/bugs/366651
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