[SOLVED] Graphics card hot change

thomasbb · 01-10-2021, 08:53 AM

Quote:

Originally Posted by pan64

Also I think you can have only one console, so you cannot use 2 monitors in console mode

For the moment, I'm following this book step-by-step and it only uses console mode... When I'll install a DE, it should work fine. Thank you for your help

computersavvy · 01-10-2021, 04:03 PM

Quote:

Originally Posted by thomasbb

For the moment, I'm following this book step-by-step and it only uses console mode... When I'll install a DE, it should work fine. Thank you for your help

It is nice to see someone who actually tries to learn things step by step instead of just complaining when things don't go as expected.

obobskivich · 01-10-2021, 10:41 PM

Quote:

Originally Posted by pan64

Furthermore I think nvidia (or nouveau) required only for GUI, otherwise yes, there is a basic support in the kernel for non-graphical environments.

FWIW my non-GUI (has no X installed) Slackware box still loads and runs noveau for the GeForce that provides its video output - I get higher resolution terminal + colors with this loaded, so I assume its 'doing something' vs not having it loaded.

I think you're right on needing X to run multiple monitors independently, but I'm not sure it will require a full DE, so if the goal is a 'fairly light' system that still uses two monitors for primarily/exclusively CLI there's probably some configuration 'on the margins' that can work. If the eventual goal is to run KDE or XFCE or somesuch then just wait until that is done, and things should 'just work' as long as the two graphics cards (it isn't clear to me that this system is using two graphics cards, or two outputs from one card) are relatively similar in age (this is relatively badly documented for non-nVidia systems - nvidia maintains release notes that show which hardware will work under a given driver version; for Radeon I've had good luck staying within 4-6 generations of the two cards, but really 'far apart' configurations tend to fail). See here for more information on advanced configurations:
https://wiki.archlinux.org/index.php...as_Primary_GPU
https://wiki.gentoo.org/wiki/AMDGPU#...card_is_in_use

thomasbb · 01-11-2021, 01:57 PM

Quote:

Originally Posted by computersavvy

It is nice to see someone who actually tries to learn things step by step instead of just complaining when things don't go as expected.

Being a hobbyist is not enough to get certified... It takes to list services and set up LVM or RAID manually, let alone user creation with skeletons. Thanks for your support

Quote:

Originally Posted by obobskivich

If the eventual goal is to run KDE or XFCE or somesuch then just wait until that is done, and things should 'just work' as long as the two graphics cards (it isn't clear to me that this system is using two graphics cards, or two outputs from one card) are relatively similar in age

The DE installation should fix this... At least, there is nothing worrying from a minimal CentOs installation not to handle multiple monitors: there's nothing installed. Thanks for the links

mrmazda · 01-13-2021, 02:29 AM

The utility "screen" may be worth investigating for running multiple cards and getting different output on each.

thomasbb · 01-27-2021, 08:29 AM

Quote:

Originally Posted by mrmazda

The utility "screen" may be worth investigating for running multiple cards and getting different output on each.

The motherboard has only one PCI slot, so I won't be able to run both cards... Isn't "screen" a command to split the terminal by the way?

mrmazda · 01-27-2021, 12:20 PM

It may depend on your meaning of "split". Check out the screen man page. It's huge.

thomasbb · 01-28-2021, 11:01 AM

Quote:

Originally Posted by mrmazda

It may depend on your meaning of "split". Check out the screen man page. It's huge.

By split I meant like tmux does, with 'panels' or 'windows'. The screen man page has 3193 lines, it can be called huge...

By curiosity, how would you do that? Say you have two graphics cards and one screen on each, how can you use the screen command to use both?