My new laptop with Intel Core Ultra and discrete graphics (NVIDIA RTX 500 Ada) refuses to start Plasma. I have read a lot of things about getting Plasma to run with NVIDIA GPU, I think I tried all of them (?), I’m still stuck, so help would be much appreciated.
A first issue occurred when I attempted to boot the machine with neon-user-20240704-0716.iso from a USB drive: the machine would stall with some kernel messages that I believe are unrelated:
[ 5.312462] spi-nor spi0.0: unrecognized JEDEC id bytes: f7 f0 30 09 d6 0o
[ 5.436397]
[ 5.615819] iwlwifi 0000:00:14.3: WRT: Invalid buffer destination
[ 5.777757] iwlwifi 0000:00:14.3: Not valid error log pointer 0x00279848 for RT uCode
[ 6.171131] iwlwifi 0000:00:14.3: HRT: Invalid buffer destination
[ 6.328458] iwlwifi 0000:00:14.3: Not valid error log pointer 0x00279848 for RT ucode
[ 7.012847] Bluetooth: hci0: Malformed MSFT vendor event: 0x02
I could successfully start the live CD by appending nomodeset 3 to the grub configuration, then logging into the terminal as neon user with empty password, then issuing startx. From there, I was able to install Neon onto the system. During installation, the machine had a LAN connection.
After installation, Plasma won’t start, it stalls with the same messages. However, I can CTRL3 into a console, but I am unable to start a GUI session from there, regardless whether I issue startx or startplasma-wayland.
When I append nomodeset 3 to the grub kernel line, I can log into a terminal and start Plasma from there (startx), but it will run in safe graphics mode.
I have then installed NVIDIA drivers like this:
add-apt-repository ppa:graphics-drivers/ppa
apt install nvidia-driver-550 # also tried with -555
apt install libnvidia-egl-wayland1
But that does not make a difference.
Furthermore, whether I issue prime-select intel or prime-select nvidia does not make a difference. systemctl restart display-manager appears to do something, but then I am again stuck with some text messages.
$ cat /sys/module/nvidia_drm/parameters/modeset
Y
$ nvidia-smi
Fri Jul 12 09:10:40 2024
+-----------------------------------------------------------------------------------------+
| NVIDIA-SMI 550.100 Driver Version: 550.100 CUDA Version: 12.4 |
|-----------------------------------------+------------------------+----------------------+
| 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 RTX 500 Ada Gener... Off | 00000000:01:00.0 Off | N/A |
| N/A 37C P8 2W / 35W | 86MiB / 4094MiB | 0% Default |
| | | N/A |
+-----------------------------------------+------------------------+----------------------+
+-----------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=========================================================================================|
| 0 N/A N/A 1021 G /usr/lib/xorg/Xorg 5MiB |
| 0 N/A N/A 1084 G /usr/bin/sddm-greeter-qt6 76MiB |
+-----------------------------------------------------------------------------------------+
$ dmesg | grep nvidia
[ 4.531890] audit: type=1400 audit(1720766065.988:4): apparmor="STATUS" operation="profile_load" profile="unconfined" name="nvidia_modprobe" pid=654 comm="apparmor_parser"
[ 4.531894] audit: type=1400 audit(1720766065.988:5): apparmor="STATUS" operation="profile_load" profile="unconfined" name="nvidia_modprobe//kmod" pid=654 comm="apparmor_parser"
[ 4.551890] nvidia: loading out-of-tree module taints kernel.
[ 4.551895] nvidia: module license 'NVIDIA' taints kernel.
[ 4.551898] nvidia: module verification failed: signature and/or required key missing - tainting kernel
[ 4.551898] nvidia: module license taints kernel.
[ 4.670952] nvidia-nvlink: Nvlink Core is being initialized, major device number 509
[ 4.672831] nvidia 0000:01:00.0: enabling device (0000 -> 0003)
[ 4.740752] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms 550.100 Thu Jun 27 18:13:10 UTC 2024
[ 4.766417] [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
[ 6.713172] nvidia-modeset: WARNING: GPU:0: Correcting number of heads for current head configuration (0x00)
[ 6.713262] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on minor 0
[ 6.726504] nvidia_uvm: module uses symbols nvUvmInterfaceDisableAccessCntr from proprietary module nvidia, inheriting taint.
[ 6.752703] nvidia-uvm: Loaded the UVM driver, major device number 507.
[ 7.838023] nvidia-modeset: WARNING: GPU:0: Correcting number of heads for current head configuration (0x00)
[ 7.873993] nvidia-modeset: WARNING: GPU:0: Correcting number of heads for current head configuration (0x00)
[ 8.514773] nvidia-modeset: WARNING: GPU:0: Correcting number of heads for current head configuration (0x00)
da
$ journalctl --user-unit plasma-plasmashell
Jul 12 09:02:21 ### plasmashell[3310]: error getting max screen brightness via dbus: QDBusError("org.freedesktop.DBus.Error.UnknownObject", "No such object path '/org/kde/Solid/PowerManagement/Actions/BrightnessControl'")
Jul 12 09:04:55 ### plasmashell[3310]: ICE default IO error handler doing an exit(), pid = 3310, errno = 11
Jul 12 09:04:55 ### plasmashell[3310]: org.kde.pulseaudio: No object for name "alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp__sink"
Jul 12 09:04:55 ### plasmashell[3310]: org.kde.pulseaudio: No object for name "alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp__sink"
Jul 12 09:04:55 ### plasmashell[3310]: org.kde.pulseaudio: No object for name "alsa_input.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp_6__source"
Jul 12 09:04:55 ### plasmashell[3310]: org.kde.pulseaudio: No object for name "alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp__sink"
Jul 12 09:04:55 ### plasmashell[3310]: org.kde.pulseaudio: No object for name "alsa_input.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp_6__source"
Jul 12 09:04:56 ### systemd[1211]: plasma-plasmashell.service: Main process exited, code=exited, status=1/FAILURE
Jul 12 09:04:56 ### systemd[1211]: plasma-plasmashell.service: Failed with result 'exit-code'.
Jul 12 09:04:56 ### systemd[1211]: Stopped KDE Plasma Workspace.
$ xrandr --output VGA-0 --off
Can't open display
I also added a line KWIN_DRM_DEVICES="/dev/dri/card0" to /etc/environment after veryfing with drm_info that the NVIDIA card is indeed card0 – no difference.
Help 
