Problems with Resolution and My Monitor in Fedora Core 25

Well, my monitor always has been a bit of a problem child, but it worked, so I didn't mind.

I let it bounce once on the floor, but besides some slight discolouring in the lower-right corner, it was fine.

It reports EDID settings that are completely crap, but I got used to ignoring those, using xrandr.

XRandr settings that work for me

The following settings work:

xrandr --newmode "1920x1440" 339.50  1920 2072 2280 2640  1440 1443 1447 1514 -
xrandr --addmode VGA-0 1920x1440
xrandr --newmode "1600x1200" 235.00  1600 1728 1896 2192  1200 1203 1207 1262 -
xrandr --addmode VGA-0 1600x1200
xrandr --newmode "1280x1024"  159.50  1280 1376 1512 1744  1024 1027 1034 1078
xrandr --addmode VGA-0 1280x1024
xrandr --output VGA-0 --mode 1920x1440

Problem

Then I upgraded to Fedora Core 25, and my monitor showed me a handsome 1024x768, which was a disappointment to say the least. (I'm used to 1920x1440.)

Using xrandr gave me the cryptic error message:

bash-4.3$ xrandr --output XWAYLAND0 --mode "1920x1440"
xrandr: Configure crtc 0 failed

After some research I noticed that Fedora Core 25 is the first one to use Wayland¹ as the default.

Solution

Switching back to the old Xorg² fixed my problem.

Checking graphics card

bash-4.3$  lspci -nnk |grep -A 3 -i vga
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Juniper XT [Radeon HD 5770] [1002:68b8]
        Subsystem: ASUSTeK Computer Inc. Device [1043:0344]
        Kernel driver in use: radeon
        Kernel modules: radeon

References

[1] Wayland Desktop

https://wayland.freedesktop.org/

[2] Fedora Project - Switching back to Xorg

https://fedoraproject.org/wiki/Changes/WaylandByDefault

Fedoraforum.org - how to install amd/ati driver on fedora 25?

http://forums.fedoraforum.org/showthread.php?t=312919

AskFedora - How to add a custom resolution to Weyland Fedora 25?

https://ask.fedoraproject.org/en/question/99867/how-to-add-a-custom-resolution-to-weyland-fedora-25/

ArchLinux - Forcing modes and EDID

https://wiki.archlinux.org/index.php/Kernel_mode_setting#Forcing_modes_and_EDID

Bugzilla Redhat - My Bugreport

https://bugzilla.redhat.com/show_bug.cgi?id=1443761