Not what I expected!
Setup - a linux workhorse, thinkpad T430 connected to an external LG 2560x1080 monitor via a lenovo docking station (displayport).
- LM17.3 through LM18.3 (4.4 kernel) - mint just installs 'out of the box' with the external monitor at 2560x1080.
- LM19.x (4.15 kernel) - mint installs, but external monitor at 1920x1080 and have to set 2560x1080 with xrandr. Not a thinkpad/linux problem, blame LG for a poorly configured EDID and kernel changes between 4.5.7 and later.
- LM20... well see the screenshot. This is booting from the install USB stick in UEFI mode.
What the screenshot doesn't show is the screen tearing and flickering to accompany the screwed up display. Anyway, proceeded with install and rebooted to new installation. Same result on external monitor. So what's going on...
Open laptop lid to activate laptop screen - external monitor clears to a 'normal' display (didn't check resolution). Close laptop lid so that external monitor is the only screen, screen stable at 1920x1080 (same as with LM19.x - need to set 2560x1080 via xrandr, but not yet tested).
If the only way LM20 is going to work is by opening and closing the laptop lid to get the display working every time I boot - well, it's not going to happen. Now back on LM19.0.
LG ultrawide monitors have caused problems with linux in the past, there are several posts on the forum (I wouldn't buy another one), but if I were a newbie it would be a real put-off. Nothing special about the graphics, inxi -G (booting from LM19.0 with a 'custom' modeline to get 2560x1080):
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andy@T432 ~ $ inxi -G Graphics: Card: Intel 3rd Gen Core processor Graphics Controller Display Server: x11 (X.Org 1.19.6 ) drivers: modesetting (unloaded: fbdev,vesa) Resolution: firstname.lastname@example.org OpenGL: renderer: Mesa DRI Intel Ivybridge Mobile version: 4.2 Mesa 19.2.8