Hello,

i have an old computer having
- 1 VGA and
- 1 HDMI cable output.
With previous Slackware version 14.2 i got always mirroring or maximum laptop + 1 addtional monitor. I would like to ask how could i get a notion if version 15 would support 2 additional monitors? What it does depend on - graphic card or computer type? Perhaps Slackware version has nothing to do with peripheral screen support. Would be perfect to have a laptop + 2 additional monitors.

greetings!

I am running Slackware current with three monitors. Xfce with three side by side desktops - no mirroring. My graphics card has three DisplayPort outputs. I didn't have to do anything other than install the Nvidia drivers.

Only annoyance is the rare times when I bumped a power button or powercord and have to rearrange the monitor layout in the Xfce Display control panel. When the powered off monitor turns back on it defaults to a mirror of one of the other two. Rare enough that I haven't gotten around to seeing if I can have it just return to the previous three side by side desktops.

Yes it should work without anything extra required. As noted above, at most you'd need to configure the exact arrangement in the settings of your preferred DE.

The software support for 3 monitors (and beyond!) is pretty much "out of the box". My only real challenges were hardware related. This page may or may not contain something useful for you:

https://ratfactor.com/slackware/three-monitors

If nothing else, it has a picture that proves it's possible, which can be nice to know.

I use xrandr to view info about my displays and configure them.

1 members found this post helpful.

I have absolutely no issues running both slackware64 Current and slackware64 15.0 dual monitors in KDE Plasma 5 on three different systems. It even works fine thru two different KVM physical switches.

In one case the VGA/DVI is on the motherboard (aka AMD Ryzen 5 3400G with Radeon RX Vega 11 Graphics), one is on a PCI Express 2.0 x16 slot Radeon HD 5750 Graphics Card DVI/DVI Dual Head, and the other is on a [AMD/ATI] RV620 LE [Radeon HD 3450] PCIE Graphics Card VGA/DVI Dual Head.

It works perfectly fine with the advanced hardware on the motherboard & the older Radeon tech as PCIE cards.

1 members found this post helpful.

You could try with a liveslak ISO for Slackware 15.0. Boot it up on your old computer and see if your monitor setup improves compared to Slackware 14.2
See here for the ISO (I can only find a 64bit version): https://slackware.nl/slackware-live/...e64-15.0-live/

1 members found this post helpful.

i bought a VGA-to-HDMI converter and i plugged the second monitor.
Unfortunately i was able to figure out that either HDMI-port is working or VGA-port is working (when i unplug the HDMI-one). Both of them are not working as HDMI seems to prevail over the VGA-output. Could i be missing some setting on BIOS or so to make them both working at the same time? i do not find any related setting. After i restarted at the login screen (VGA-output is activated). As soon as i have authenticated myself VGA-gets disabled and HDMI-output becomes active. I have installed nvidia drivers but i do not find such settings in the application. Only my HDMI-connected Monitor is being idenified by the system.