How to make pureos support more resolutions?


#1

The best resolution for my computer is 1366x768, but I have no that selection, the largest that I can choose is 1024x768.
When I’m trying to add a resolution selection, it outputs error:
xrandr: Failed to get size of gamma for output default
How to make pureos support more resolution?
Meanwhile, I can’t reboot because I use it as a live CD. And it’s better for me to avoid installing non-free software.


#2

What video card you use? It probably generic problem, not PureOS specific.


#3

AMD Radeon HD 6370M
I wonder why Ututo supports many resolutions including 1366x768 for my computer, as an entirely free system too.


#4

It have open-source driver. I don’t know, why it doesn’t work. Do you use wayland or Xorg?
https://www.phoronix.com/scan.php?page=article&item=amd_hd6000_dpm


#5

I don’t know what wayland and Xorg are…
Oh…More problems…I gave up to install driver.:persevere:
I do believe there’s some way to change the resolution without installing driver. Because PureOS can display 1920x1080 on some computer without installing anything.


#6

PureOS doesn’t include the proprietary firmware needed for AMD or NVIDIA GPUs. You’re probably running VESA, a generic GPU driver, rather than AMDGPU/radeonsi drivers.

Edit: Sorry, because you’re not running AMD drivers, that’s the reason for the lack of resolutions listed.


#7

This videocard has open-source driver.


#8

but also binary blob:
[root@dei ~]# ls -la /lib/firmware/radeon/ | wc
250 2243 15099


#9

Maybe better to change linux distrubution to something, that allow to install binary blobs? You must be lucky to have system, that can work perfectly without proprietary blobs.


#10

AMDGPU/radeonsi are free drivers that live in the kernel. But you need their proprietary firmware in order to use the GPU.


#11

Thank you all, I understood.:sweat_smile:
Sorry for disturbing.


#12

yes intel/AMD iGPUs/dGPUs are enabled through the MESA-linux-driver-stack but AMD ALSO offers a proprietary driver (for workstation GPUs) that MOST of the time works best with an LTS-linux-kernel.