Cannot get correct screen resolution after installing Debian 8.6

manashpal · 11-24-2016, 06:41 AM

I have the following VGA card in my system :

VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS780L [Radeon 3000]

after installing Debian 8.6 , My screen resolution has been set to 1024 * 768 . but none of any linux installation has given me such kind of problem. Presently I am using ubuntu 16.04 , the screen resolution has been correctly autoconfigured. ( 1366 * 768 ).

I am not getting any option to modify the issue on debian, any idea ?

Ztcoracat · 11-24-2016, 07:39 PM

You could give xrandr a try. Read about it first though to see if it's what you want.
https://pkg-xorg.alioth.debian.org/h...se-xrandr.html

http://superuser.com/questions/71679...tion-in-debian
https://log.rowanto.com/monitor-reso...n-7-or-wheezy/

HTH

Emerson · 11-25-2016, 01:10 AM

Probably correct video driver does not load and Xorg falls back to VESA, no telling without looking at Xorg log ... which was not provided by OP.

Ztcoracat · 11-25-2016, 04:41 PM

When you get a chance, manashpal, post the output of your Xorg file so we can see what you have going on.

You didn't install the proprietary AMD/ATI driver did you?

When I installed that driver it made a mess of my graphics.

AwesomeMachine · 11-25-2016, 06:41 PM

The correct resolution actually comes from the monitor, not the video card. Using a KVM switch can cause the wrong resolution.

Ztcoracat · 11-25-2016, 08:24 PM

Quote:

Originally Posted by AwesomeMachine

The correct resolution actually comes from the monitor, not the video card. Using a KVM switch can cause the wrong resolution.

Could going through the settings on the monitor itself solve the issue?

What Emerson said makes sense if the driver is not loading.

In some cases if the wrong driver is loading first it will also cause the device not to work or fall to defaults.

ondoho · 11-26-2016, 03:33 AM

Quote:

Originally Posted by manashpal

after installing Debian 8.6 , My screen resolution has been set to 1024 * 768 . but none of any linux installation has given me such kind of problem. Presently I am using ubuntu 16.04 , the screen resolution has been correctly autoconfigured. ( 1366 * 768 ).

please provide the output from

Code:

lspci -k | grep -iEA5 'vga|3d'

for both installs.

seasons · 11-26-2016, 07:06 AM

Did you install the appropriate firmware package?
https://packages.debian.org/jessie/f...-linux-nonfree

Ztcoracat · 11-26-2016, 01:25 PM

The linux non free firmware that seasons is asking you for is essential.
This package contains the binary firmware for various drivers in the Linux kernel.So.....
if you haven't already installed it I encourage you to do so.

Thanks seasons:-

Don't forget to post the output for ondoho:-

Emerson · 11-26-2016, 01:39 PM

If any firmware is missing it would be seen in dmesg, not provided by OP either.

ondoho · 12-03-2016, 03:52 AM

and another one that never came back.
interestingly, this one has a post history of 5 posts, and 5 threads. despicable.

Gad · 12-03-2016, 05:32 AM

If it is any consolation this thread helped me with similar issue with my work pc. Thank you :P

ondoho · 12-03-2016, 06:53 AM

that's another way of looking at it.

Ztcoracat · 12-03-2016, 12:34 PM

Quote:

Originally Posted by mariose

If it is any consolation this thread helped me with similar issue with my work pc. Thank you :P

Glad to hear this thread was helpful.

Mithrandiraceous · 08-03-2021, 01:52 PM

Hello, i've just used one of the tips you provided, still helpful after all this time.

¡Thanks seasons and Ztcoracat!