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#1 2021-08-22 23:39:23
- WellWellWell
- Member
- Registered: 2021-08-22
- Posts: 14
[SOLVED] Console Display Corruption on Widescreen
I am trying to use a ROG Swift PG27VQ monitor to boot into Arch. During kernel boot, where all of the device messages are being displayed, I can see the output clearly. As the boot progresses the screen becomes garbled with green lines and it's impossible to read. This happens with the Live USB as well as a drive I just set Arch up on by way of using an old monitor that does not have this problem.
I'm assuming this is purely display-related as the system still responds to things like blindly typing 'shutdown now'. I'm also assuming it's related to the 3440x1440 resolution vs. the 1920x1080 of the backup monitor.
I have an RTX2080 Ti, tho it has been my assumption that hardware-specific drivers (AMD/NVIDIA/etc.) have no impact on the root console and are not loaded at that point. (please correct me if wrong).
There is one point of note that may be important. The monitor that works is via an HDMI port. The monitor that corrupts just before the login prompt is DisplayPort.
Can someone point me in the right direction to begin researching and repairing this problem?
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CONCLUSION
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I was completely wrong about the video driver not impacting the console at a very low level, it most definitely does. The default video driver (nouveau?) was freaking out when I had a monitor connected via DisplayPort and an AV Receiver connected via HDMI on the same NVIDIA card (2080TI). The short solution was to remove the AV Receiver so I could work as expected. I was then able to install the 'nvidia' package, install and configure rEFInd with some boot loader params to fix the janky console resolution and all is well. I now have both devices connected without issue.
Last edited by WellWellWell (2021-08-28 15:21:38)
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#2 2021-08-23 00:01:06
- Zod
- Member
- From: Hoosiertucky
- Registered: 2019-03-10
- Posts: 636
Re: [SOLVED] Console Display Corruption on Widescreen
If it were me, I would figure out what graffics card(s) you have and refer to the wiki on how to set it (them) up.
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#3 2021-08-23 00:45:20
- WellWellWell
- Member
- Registered: 2021-08-22
- Posts: 14
Re: [SOLVED] Console Display Corruption on Widescreen
If it were me, I would figure out what graffics card(s) you have and refer to the wiki on how to set it (them) up.
I'm definitely continuing that effort looking for any leads I can latch onto.
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#4 2021-08-23 00:58:04
- Zod
- Member
- From: Hoosiertucky
- Registered: 2019-03-10
- Posts: 636
Re: [SOLVED] Console Display Corruption on Widescreen
I'm definitely continuing that effort looking for any leads I can latch onto.
Well that's good. I wish you luck!
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#5 2021-08-23 02:47:38
- WellWellWell
- Member
- Registered: 2021-08-22
- Posts: 14
Re: [SOLVED] Console Display Corruption on Widescreen
Well that's good. I wish you luck!
Well, I seem to have found the cause.
When I use the DisplayPort monitor I also plug the card's HDMI into my receiver for 5.1 sound (I cannot do this with the HDMI monitor filling that port). If I have this receiver turned off, the console does not get corruption and the widescreen display works. There are some kernel msgs that are generated if I turn on the receiver after the system has booted but I'm not ready to dive into that just yet.
Anyway, wanted to tack that onto the post for posterity. Thanks!
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