Resolution of a screen

Hi,
I am running Arch for about 1 year, doing upgrades from time to time. It is a graphical mode desktop. I have upgraded week or two ago.
Now each time I want to change the resolution of the screen, the screen goes blank with 'unsupported mode' message on it. The screen only works on maximum resolution detected at boot time.
Video card: VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series]
Driver: extra/xf86-video-ati 1:7.5.0-2
Connected to screen via Display Port.
Any known bug with it ?
Thanks,
Dima.
Last edited by dmitris (2015-05-23 08:12:24)

This is the list, apart from the highest none works
$ xrandr
Screen 0: minimum 320 x 200, current 2560 x 1600, maximum 8192 x 8192
DisplayPort-0 connected primary 2560x1600+0+0 (normal left inverted right x axis y axis) 641mm x 401mm
2560x1600 59.97*+
1920x1440 60.00
1920x1200 59.88
1920x1080 60.00 50.00 59.94 24.00 23.98
1920x1080i 60.00 50.00 59.94
1600x1200 60.00
1280x1024 75.02 60.02
1280x800 59.81
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.08 60.00
800x600 75.00 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
DVI-0 disconnected (normal left inverted right x axis y axis)
I am trying to set 1280x800 since I am looking on the screen from far
Last edited by dmitris (2015-05-23 08:46:46)

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