Serkan, I am assuming that this Nvidia video card is in a laptop?
Is your GUI using Wayland? If it is, for testing purposes, I recommend switching back to X11. You may have a hardware fault? Hoping that you do not have a hardware fault, I would recommend installing Nvidia proprietary drivers. I would install and then run nvidia-detect and install the nvidia drivers it recommends. # apt install nvidia-detect # nvidia-detect # apt install [package recommended by nvidia-detect] If these drivers causes issues you should be able to remove the nvidia drivers by # apt purge nvidia* This Debian Wiki explains Nvidia proprietary driver installation better than I can: https://wiki.debian.org/NvidiaGraphicsDrivers For testing Nvidia drivers I like to use glmark2 # apt install glmark2 If your GUI is using Wayland, then also install glmark2-wayland # apt install glmark2 glmark2-wayland $ glmark2 or $ glmark2-wayland (for Wayland systems) Hope this helps. George. On Tuesday, 31-12-2024 at 22:07 Serkan Kurt wrote: > Hi! > How can I test memory of the graphics card? > How can I test other features of the graphics card? > Is there free software for this purpose? > > The menu texts in the "Blender" software are not readable. Sometimes > the system freezes while watching a video. > > nouveau 0000:01:00.0: fifo: CACHE_ERROR - ch 5 [systemd-logind[502]] > subc 0 mthd 0060 data beef0201 > > nouveau 0000:01:00.0: firmware: failed to load nouveau/nv84_xuc00f (-2) > nouveau 0000:01:00.0: firmware: failed to load nouveau/nv84_xuc00f (-2) > nouveau 0000:01:00.0: Direct firmware load for nouveau/nv84_xuc00f > failed with error -2 > nouveau 0000:01:00.0: vp: unable to load firmware nouveau/nv84_xuc00f > nouveau 0000:01:00.0: vp: init failed, -2 > nouveau 0000:01:00.0: firmware: failed to load nouveau/nv84_xuc103 (-2) > nouveau 0000:01:00.0: firmware: failed to load nouveau/nv84_xuc103 (-2) > nouveau 0000:01:00.0: Direct firmware load for nouveau/nv84_xuc103 > failed with error -2 > nouveau 0000:01:00.0: bsp: unable to load firmware nouveau/nv84_xuc103 > nouveau 0000:01:00.0: bsp: init failed, -2 > > My graphics card is NVIDIA Corporation G86M [GeForce 8600M GS] (rev a1). > Debian 12 x86_64 GNU/Linux > > Best regards... > >