<!DOCTYPE html><html><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> In the meantime I have contacted everyone who could have something to do with it: Kernel groups System D Nvidia And gues: Everyone says it's not their fault. But we don't give up. Linux is such a beautiful and solid system. Why would it work with Windows and not Linux? Our analysis has now discovered that the problem does indeed come from the kernel. The kernel does not allow several users to access a graphics card at the same time. Indeed, to use it, several users need access to the graphics card at the same time. Can this simultaneous access be allowed by the kernel after all? Or can the kernel be adjusted so that this would be possible? <div class="moz-cite-prefix">Op 15/12/2023 om 10:59 schreef Gert Vanhaerents: </div> <blockquote type="cite" cite="mid:DUZPR10MB8267520A4F44DA38339969A78E93A@DUZPR10MB8267.EURPRD10.PROD.OUTLOOK.COM"> Op 4/12/2023 om 15:11 schreef Timur Tabi: <blockquote type="cite">On Mon, 2023-12-04 at 09:51 +0100, Gert Vanhaerents wrote: <blockquote type="cite">OK i will report it to nvidia. But with the nouveau drivers it's also not working. Are you sure it's not a kernel problem? Because according to systemd it would be a kernel problem. (personaly i am also thinking it's a driver problem) </blockquote> Unfortunately, it's not easy for Nouveau to debug problems with GSP-RM. However, if the problem exists in the proprietary driver, then Nvidia could fix it. That would then lead to a new version of OpenRM that Nouveau could use. </blockquote> I have contacted Nvidia and now i can see the outputs such like this: ─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0 │ [MASTER] drm:card0 │ ├─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0/card0-DVI-D-1 │ │ [MASTER] drm:card0-DVI-D-1 │ ├─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0/card0-HDMI-A-1 │ │ [MASTER] drm:card0-HDMI-A-1 │ └─/sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0/card0-VGA-1 │ [MASTER] drm:card0-VGA-1 But the problem is now the same of with the Nouveau driver. When you do this: loginctl attach seat1 /sys/devices/pci0000:00/0000:00:03.1/0000:08:00.0/drm/card0/card0-VGA-1 For the seat1 (the VGA d-sub output for seat1 and the other HDMI output for seat0) and of course the mouse and keyboard. When you do this, all the graphics outputs are on the second seat (seat1) and not anymore on the first seat. So i need to move only the VGA output to seat1 and not all the outputs. The problem is that linux can not start 2 or more window managers on one card (even if you don't need a multiseat, but use only one mouse and keyboard). So how can i fix that i can use more than one window manager on one physical graphics card? (without Xephyr or something because they are to outdated and works not good). I have tried with: Linux Mint, Ubuntu and Debian all the same problem. </blockquote> </body> </html>