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#1 2019-06-17 19:41:19

Registered: 2018-05-07
Posts: 5

Live USB TTY scrambled (nvidia RTX5000 connected to 4k display)

I'm trying to install arch from a live usb key on a dell optiplex, and during the boot sequence the screen becomes scrambled ( right after "Triggering uevents...".  Before that (including during the boot selection menu) everything looks fine (as you can see at the top of the screen on the image).  Afterwards, a few lines of pixels of different colors are printed and then it looks like each single line of text printed thereafter is wrapped many times around, one row of pixels at a time, which makes me suspect that there's some mismatch between the resolution the card is putting out and what the display things is happening.  Every new TTY I open with Ctrl-Alt-3 looks like this.  The system is still responsive and when I go to reboot, I see the green "OK" (just smeared over many lines).

I have a 4k dell display plugged via displayport into an NVIDIA RTX5000 card.  There's some kind of intel graphics on the motherboard but it only connects via VGA and I don't have a VGA compatible display handy (or a converter) so I'm hoping someone here has a suggestion for what's going on and whether it's fixable.

moderator edit -- replaced oversized image with link.
Pasting pictures and code

Last edited by 2ManyDogs (2019-06-17 22:40:32)


#2 2019-06-17 20:29:34

From: Pasadena, CA
Registered: 2009-07-13
Posts: 16,688

Re: Live USB TTY scrambled (nvidia RTX5000 connected to 4k display)

No solution to the problem, but a suggestion on how to investigate further......   
I suggest you ssh into the box.  I don't recall if it is enabled by default on the install media, but sshd will allow you to connect.  You may have to start it by hand by typing blind.  If you connect it to a router, wired Ethernet will connect automatically and obtain a dynamic address.   You will need to figure out the address of the box by probing or looking at the router logs.

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#3 2019-06-17 21:45:19

Registered: 2012-05-17
Posts: 3,459

Re: Live USB TTY scrambled (nvidia RTX5000 connected to 4k display)

"Triggering uevents", maybe this results in loading the nouveau graphics driver or changing the graphics mode and that may cause problems with that card. You can try to disable modesetting during the installation process and then use the proprietary nvidia driver later (reenable modesetting) … odesetting

Last edited by progandy (2019-06-17 21:47:43)

| alias CUTF='LANG=en_XX.UTF-8@POSIX ' |


#4 2019-06-26 09:47:07

Registered: 2019-06-26
Posts: 1

Re: Live USB TTY scrambled (nvidia RTX5000 connected to 4k display)

You are not the only one with this issue, im having this as well on a 2080ti, and im not sure why, for me atleast it happens after uevnts has been triggered … eight=1400


#5 2019-07-28 08:04:13

Registered: 2019-07-28
Posts: 1

Re: Live USB TTY scrambled (nvidia RTX5000 connected to 4k display)

hi, i have the same problem.
in my case it startet as i updatet my cpu from amd 1800x to amd 3800x.
i also have an rtx 2080, but before the cpu upgrade the iso bootet just fine,
and i also tryed to boot a custom arch-iso with the nvidia(430) driver, wih the same results.

just for info my system specs:

mainboard: asus prime 570-p (newest bios)
cpu: amd 3800x
ram: 32GB
grafik: geforce rtx 2080


after consolting the wiki a bit more, i got it work with the "nomodeset" parameter roll .

Last edited by dikiy4eburator (2019-07-28 08:37:52)


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