resolution of a screen

dmitris · 2015-05-23 08:10:45

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)

jasonwryan · 2015-05-23 08:26:47

What modes are available? What is the current resolution and what are you trying to set?

Please read How To Ask Questions The Smart Way and provide some relevant information.

Moving to NC...

dmitris · 2015-05-23 08:35:36

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)

jasonwryan · 2015-05-23 08:43:25

Did you read the link I pasted? What command are you using and what error are you seeing?

Also, use code tags when pasting to the boards: https://wiki.archlinux.org/index.php/Fo … s_and_code

dmitris · 2015-05-23 08:50:08

Re-edited the message.
List of resolutions is obtained via xrandr.

I normally switch resolution using the desktop manager GUI utilities.

But for the forum I used

xrandr -s 1280x800 ; sleep 5 ; xrandr -s 2560x1600

Then, for 5 seconds, the screen went blank. No error message from xrandr

Arch Linux

#1 2015-05-23 08:10:45

resolution of a screen

#2 2015-05-23 08:26:47

Re: resolution of a screen

#3 2015-05-23 08:35:36

Re: resolution of a screen

#4 2015-05-23 08:43:25

Re: resolution of a screen

#5 2015-05-23 08:50:08

Re: resolution of a screen

Board footer