[Solved]Intermittent resolution problem

MickeyRat · 2021-09-28 15:23:33

I'm running an i7 wi/ 32gb and intel graphics. The monitor is connected through a KVM switch. What's happening is that occasionally my display manager (lightdm) comes up in the default resolution (1024x780 I think) when it should come up 1920x1080. Usually a reboot solves the problem but, I have had to reboot multiple times. Because this is an occasional problem, I can't say for sure when it started.

If I go ahead and log in with the screwy resolution and try xrandr to see what's going on, I get the following error:

xrandr: output HDMI2 cannot use rotation "normal" reflection "none"

I see the same error in the xorg log.

This might be a timing issue. I tried turning on debug in udev to see if it would provide more info. I ran for over a week that way and the problem never happened while debug was on. Setting it to info made the problem return.

Any idea what I should try next?

Last edited by MickeyRat (2021-10-05 11:46:44)

V1del · 2021-09-28 15:30:21

This is indeed often a timing issue and can normally be fixed by loading your graphics modules earlier which is described in: https://wiki.archlinux.org/title/Kernel … _KMS_start

MickeyRat · 2021-09-28 15:45:42

V1del wrote:

This is indeed often a timing issue and can normally be fixed by loading your graphics modules earlier which is described in: https://wiki.archlinux.org/title/Kernel … _KMS_start

Thanks for the reply. I did what it said in that link and ran mkinitcpio -P. and it booted to the correct resolution. At this point, all that says is it didn't break anything. It'll take a little more time for me to determine whether the problem's solved. It looks promising though.

Last edited by MickeyRat (2021-09-28 15:47:25)

MickeyRat · 2021-10-05 11:46:13

It's been long enough. Time to call this one solved. Thanks V1del!

Arch Linux

#1 2021-09-28 15:23:33

[Solved]Intermittent resolution problem

#2 2021-09-28 15:30:21

Re: [Solved]Intermittent resolution problem

#3 2021-09-28 15:45:42

Re: [Solved]Intermittent resolution problem

#4 2021-10-05 11:46:13

Re: [Solved]Intermittent resolution problem

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