NVIDIA driver the hard way - install works - fonts scaling not

English Hardware
#1

So I did a fresh install on an old machine: Core2Quad + NVIDIA Geforce GTX 960 / Tumbleweed + X11 + KDE Plasma

Initialy the nouveau driver is installed and everything works fine except the video performance, so I installed the prop nvidia driver the easy way to get more performance: https://en.opensuse.org/SDB:NVIDIA_drivers

Rebooted and got this issue with the fonts in some applications. Not all like the file manager looks good: https://imgur.com/a/RB4g3sZ

I then reverted to nouvea to check if it’s the driver and it worked again. I then installed the nvidia driver the hard way to have the most recent version: https://en.opensuse.org/SDB:NVIDIA_the_hard_way

So the driver is installed properly but I still have the issue with the fonts.

The system fonts are untouched at 10 px. Changing it has no effect.


nvidia-smi 
Thu Dec 30 11:45:28 2021        
+-----------------------------------------------------------------------------+ 
| NVIDIA-SMI 495.46       Driver Version: 495.46       CUDA Version: 11.5     | 
|-------------------------------+----------------------+----------------------+ 
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC | 
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. | 
|                               |                      |               MIG M. | 
|===============================+======================+======================| 
|   0  NVIDIA GeForce ...  Off  | 00000000:04:00.0  On |                  N/A | 
| 22%   14C    P8    15W / 130W |    352MiB /  2000MiB |      0%      Default | 
|                               |                      |                  N/A | 
+-------------------------------+----------------------+----------------------+ 
                                                                                
+-----------------------------------------------------------------------------+ 
| Processes:                                                                  | 
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory | 
|        ID   ID                                                   Usage      | 
|=============================================================================| 
|    0   N/A  N/A      2041      G   /usr/bin/Xorg.bin                 160MiB | 
|    0   N/A  N/A      2115      G   /usr/bin/kwin_x11                  30MiB | 
|    0   N/A  N/A      2161      G   /usr/bin/plasmashell               34MiB | 
|    0   N/A  N/A      2331      G   /usr/lib64/firefox/firefox         76MiB | 
|    0   N/A  N/A      2619      G   /usr/bin/nvidia-settings            0MiB | 
|    0   N/A  N/A      2954      G   ...bexec/kscreenlocker_greet       39MiB | 
+-----------------------------------------------------------------------------+


hwinfo --gfxcard       
24: PCI 400.0: 0300 VGA compatible controller (VGA)              
  [Created at pci.386] 
  Unique ID: YmUS.D4hWus3_5u4 
  Parent ID: vSkL.sSQWPCkbidF 
  SysFS ID: /devices/pci0000:00/0000:00:01.0/0000:04:00.0 
  SysFS BusID: 0000:04:00.0 
  Hardware Class: graphics card 
  Model: "nVidia GM206 [GeForce GTX 960]" 
  Vendor: pci 0x10de "nVidia Corporation" 
  Device: pci 0x1401 "GM206 [GeForce GTX 960]" 
  SubVendor: pci 0x1458 "Gigabyte Technology Co., Ltd" 
  SubDevice: pci 0x3690  
  Revision: 0xa1 
  Driver: "nvidia" 
  Driver Modules: "nvidia" 
  Memory Range: 0xfd000000-0xfdffffff (rw,non-prefetchable) 
  Memory Range: 0xe0000000-0xefffffff (ro,non-prefetchable) 
  Memory Range: 0xde000000-0xdfffffff (ro,non-prefetchable) 
  I/O Ports: 0xec00-0xec7f (rw) 
  Memory Range: 0x000c0000-0x000dffff (rw,non-prefetchable,disabled) 
  IRQ: 29 (17513 events) 
  I/O Ports: 0x3c0-0x3df (rw) 
  Module Alias: "pci:v000010DEd00001401sv00001458sd00003690bc03sc00i00" 
  Driver Info #0: 
    Driver Status: nouveau is not active 
    Driver Activation Cmd: "modprobe nouveau" 
  Driver Info #1: 
    Driver Status: nvidia_drm is active 
    Driver Activation Cmd: "modprobe nvidia_drm" 
  Driver Info #2: 
    Driver Status: nvidia is active 
    Driver Activation Cmd: "modprobe nvidia" 
  Config Status: cfg=new, avail=yes, need=no, active=unknown 
  Attached to: #12 (PCI bridge) 

Primary display adapter: #24
#2

Uninstall both drivers, then install needed driver.

#3

I already did “nomodeset 3” in grub and blacklisted the driver or is there another way?

#4

You may not be understanding the realm of drivers. Nomodeset disables all competent FOSS drivers, though it possibly is compatible with some proprietary NVidia driver versions. It’s basically a troubleshooting and repairs-enabling tool. Blacklisting the nouveau kernel driver (module) also disables all competent FOSS drivers. Take a look at this primer to understand the drivers and their roles.

If /etc/X11/xorg.conf or *.conf in /etc/X11/xorg.conf.d/ affecting video/graphics exist after proprietary NVidia driver removal remain, remove them for best results with FOSS drivers.

If using NVidia’s proprietary drivers with anything related in /etc/X11/xorg.con*, make sure nothing in them sets DPI to any value other than whatever is most appropriate to your display density (DPI), as it can affect fonts in non-KDE, non-QT applications. In GTK applications, special customization may be required for acceptable fonts.

Please provide input/output from inxi -SGay using code tags.

#5 
inxi -SGay 

**System:**
  **Host:** gamer **Kernel:** 5.15.8-1-default x86_64 **bits:** 64 **compiler:** gcc **v:** 11.2.1 
  **parameters:** BOOT_IMAGE=/boot/vmlinuz-5.15.8-1-default 
  root=UUID=e95c6fee-a744-4eca-a894-4f5bd89656bf splash=silent 
  mitigations=auto quiet 
  **Console:** pty pts/0 **DM:** SDDM **Distro:** openSUSE Tumbleweed 20211226 
**Graphics:**
  **Device-1:** NVIDIA GM206 [GeForce GTX 960] **vendor:** Gigabyte **driver:** nvidia 
  **v:** 495.46 **alternate:** nouveau,nvidia_drm **bus-ID:** 04:00.0 **chip-ID:** 10de:1401 
  **class-ID:** 0300 
  **Display:****server:** X.org 1.21.1.2 **driver:****loaded:** nvidia **tty:** 179x62 
  **Message:** Advanced graphics data unavailable in console. Try -G --display


inxi -SGay --display 

**System:**
  **Host:** gamer **Kernel:** 5.15.8-1-default x86_64 **bits:** 64 **compiler:** gcc **v:** 11.2.1 
  **parameters:** BOOT_IMAGE=/boot/vmlinuz-5.15.8-1-default 
  root=UUID=e95c6fee-a744-4eca-a894-4f5bd89656bf splash=silent 
  mitigations=auto quiet 
  **Desktop:** N/A **dm:** SDDM **Distro:** openSUSE Tumbleweed 20211226 
**Graphics:**
  **Device-1:** NVIDIA GM206 [GeForce GTX 960] **vendor:** Gigabyte **driver:** nvidia 
  **v:** 495.46 **alternate:** nouveau,nvidia_drm **bus-ID:** 04:00.0 **chip-ID:** 10de:1401 
  **class-ID:** 0300 
  **Display:****server:** X.org 1.21.1.2 **compositor:** kwin_x11 **driver:****loaded:** nvidia 
  **resolution:** <missing: xdpyinfo> 
  **Message:** No advanced graphics data found on this system.
#6

4-5 days after I made the request, I am unable to remember why I asked for this. It may have been evident in the information omitted by not running in X and/or without xdpyinfo installed. Most installations at least used to include xdpyinfo.

#7

Could be an EDID detection problem from the nvidia proprietary driver.
You can try

nvidia-xconfig --no-use-edid-dpi

Then set your desired DPI in the monitor section of nvidia.conf.