pb278q 1440p monitor not being detected properly
My 1440p 60HZ Asus pb278q monitor is being defaulted to 640x480, but my other 1080p one is fine. I replugged it (displayport) and it displayed the correct resolution but made kde vanish and crashed the system 5 minutes later.
The "Identify" button correctly identified the name after the replug.
Please help.
GTX 980
Asus z97 deluxe
39 Replies
Hello please help
It sounds like a wonky connection really. I'd try a different cable and/or port before further troubleshooting.
It's always worked fine on my windows machine. I reconnected it at the login screen and same thing - no kde but detects proper resolution, however no crash and appears to work fine.
I can access programs with alt + space, which is what I'm sending this through now, so it doesn't seem to be a wonky connection. Any idea on where to move forward from here?
Yeah, let's see if we can get kde working properly again.
Run the following commands:
rm -rf ~/.cache/plasmashell to remove the cache and systemctl --user restart plasma-plasmashell to restart plasmaNo luck there but I can get at programs with alt + space currently
I hear some linux distros can fail displayport handshake on early boot
It's possible, but I never had an issue with it.
So if I understand correctly, right now your monitor is working, but you have no background or taskbar?
I have a background but no taskbar. I never loaded any icons on the desktop but I can right click fine
can you rigt click and enter edit mode?
Oh I see it now, I'm blind, sorry
No worries. I think your task bar wondered off to a non existing monitor. If so, it's an easy fix
Yeah the middle one is the one that doesn't exist
I'm following some instructions for using read-edid to set the resolution at load, since my gtx 980 might not be fast enough, and it's telling me to use 'toolbox create'
Is there another way you'd recommend installing it?
Ayy I dragged the toolbar, thanks. The stuff ^ would permanently fix it as far as I can tell though
There's a good chance it will keep working. If you run into trouble again, your best bet would be to set the resolution and refreshrate with a kernel argument.
I'll restart and see. I think it'll do the same thing, and I'll have to re-plug
If it does, I'll help you set the kernel argument that should fix that
So on startup, the resolution problem happened again. I replugged, logged in and the taskbar was still there
Can you show me the output of
kscreen-doctor -o while it has the right resolution and refreshrate?
The idea is to apply https://wiki.archlinux.org/title/Kernel_mode_setting#Forcing_modes as it's handeld on bazziteOutput 3/DP-2 is how it's seen at startup, then replugging shows as DP-1
That's really weird that it changes dp number. Let's start with setting dp-1 manually as a karg.
sudo rpm-ostree kargs --append=video=DP-1:2560x1440@60 will add everything after = as a kernel argument.Yeah now that I think about it, it might be DP-1 before replugging
kde detects a monitor that's not there on that port for some strange reason
I have the same problem. Here is the output before replugging
I may have messed with the screen arrangement or screen priorities
Is this after applying the kernel argument?
Yeah it rebooted
😦 Is there anything pluggid in to that other dp port? It keeps seeing a monitor there
DP-1 is 640x480 before the replug, then it'll become DP-2 which is currently 1024x768
It's the same monitor though
try
sudo rpm-ostree kargs --editor and replacing the DP-1 with DP-2.
If that doesn't work, someone with more knowledge will have to jump in to help. :/How do I save the file?
Lemme check, it's a vim thing I think
:w to write
:qa to exit
What's :?
oh, it's :qw to write and exit
sac, I'm re-figuring it out so i can post a ss
Yeah it's :wq to write and exit . press esc so there's nothing on the bottom, then type :wq and enter
I'm not sure what you mean by :
Like this
Still had to replug
😦 Best remove the karg then, since it's not helping.
sudo rpm-ostree kargs --delete-if-present=video=DP-2:2560x1440@60
My best guess is that it's receiving and adhering to bogus edid info it's getting. I have no idea how to tackle thathttps://askubuntu.com/questions/689030/second-monitor-has-low-resolution
I had a problem with edid recently too, this fixed it for me
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