yes you can add kernels + headers + linux515-nvidia
can you try this:
add on boot kernels thes parameters
“amd_iommu=on iommu=pt processor.max_cstate=5 rcu_nocbs=0_11 systemd.unified_cgroup_hierarchy=true scsi_mod.use_blk_mq=1”
on file /etc/default/grub
line GRUB_CMDLINE_LINUX_DEFAULT=
sudo nano /etc/default/grub
sudo update-grubOn /etc/default/grub I already have the line
GRUB_CMDLINELINUX_DEFAULT=“loglevel=3 quiet”
…should I delete the part after “=”?
sudo update-grub added Windows 
no you keep , and ADD as line kilometer with space
OK.
I don’t know how to add the other parameters you wrote.
I know that i can edit the file before I start linux. Just seems to be a little bit complicated because there is much code for every kernel. My idea is to edit only 5.10 because I’m using this usually…
Is this the right way to edit/add the parameters?
I did it now this way: I add your written parameters at this position: GRUB_CMDLINE_LINUX_DEFAULT=“…your writen parameters” after the other parameter that i enabled again.
I did this again:
sudo update-grub
and did a reboot.
I don’t see a difference. But i see know text messages while booting.
so you reboot
inxi -Gxx
Graphics:
Device-1: NVIDIA GM204 [GeForce GTX 970] vendor: ZOTAC driver: nvidia v: 510.54 pcie:
speed: 2.5 GT/s lanes: 16 bus-ID: 26:00.0 chip-ID: 10de:13c2
Device-2: Logitech Logitech Webcam C925e type: USB driver: snd-usb-audio,uvcvideo
bus-ID: 3-1.1.2:5 chip-ID: 046d:085b
Display: server: X.org v: 1.21.1.3 driver: gpu: nvidia note: X driver n/a tty: 128x48
Message: GL data unavailable in console. Try -G --display
sudo systemctl status sddm.service
● sddm.service - Simple Desktop Display Manager
Loaded: loaded (/usr/lib/systemd/system/sddm.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2022-04-07 22:03:43 CEST; 3min 50s ago
Docs: man:sddm(1)
man:sddm.conf(5)
Main PID: 988 (sddm)
Tasks: 2 (limit: 19091)
Memory: 19.2M
CPU: 50ms
CGroup: /system.slice/sddm.service
└─988 /usr/bin/sddm
Apr 07 22:03:45 tim-manjaro sddm[988]: Failed to read display number from pipe
Apr 07 22:03:45 tim-manjaro sddm[988]: Display server stopping...
Apr 07 22:03:45 tim-manjaro sddm[988]: Attempt 2 starting the Display server on vt 1 failed
Apr 07 22:03:47 tim-manjaro sddm[988]: Display server starting...
Apr 07 22:03:47 tim-manjaro sddm[988]: Adding cookie to "/var/run/sddm/{3fb48c11-a08a-44a6-9126-beb0d204a424}"
Apr 07 22:03:47 tim-manjaro sddm[988]: Running: /usr/bin/X -nolisten tcp -background none -seat seat0 vt1 -auth /var/run/sddm/{3fb48c11-a08a-44a6-9126-beb0d204a424} -noreset -displayfd 17
Apr 07 22:03:47 tim-manjaro sddm[988]: Failed to read display number from pipe
Apr 07 22:03:47 tim-manjaro sddm[988]: Display server stopping...
Apr 07 22:03:47 tim-manjaro sddm[988]: Attempt 3 starting the Display server on vt 1 failed
Apr 07 22:03:47 tim-manjaro sddm[988]: Could not start Display server on vt 1
May i find a solution here: Kernel mode setting - ArchWiki
can you check theses points
return for each
nvidia-smi
nvidia-settings -q all
xrandr
nvidia-xconfig --query-gpu-info
sudo pacman -S mesa-utils
glxinfo | grep direct
can you tell more about your screen ( CRT , CFP , TV ) and link ( DVI , HDMI , other )
I’m currently putting the text messages into files that i will copy and paste here using windows at the same computer.
This is my screen: FUJITSU Display P27-8 TS UHD : Fujitsu Global
I’m using HDMI for my computer. There is Windows and Manjaro installed.
I’m also using the display port input for my Fujitsu port replicator. This input will be used when i connect a notebook to the port replicator. When I’m starting Windows at my computer i can change between my computer (HDMI) and the notebook (Display port).
nvidia-smi
Fri Apr 8 00:31:51 2022
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 510.54 Driver Version: 510.54 CUDA Version: 11.6 |
|-------------------------------+----------------------+----------------------+
| 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 | 00000000:26:00.0 Off | N/A |
| 29% 40C P0 41W / 151W | 0MiB / 4096MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| No running processes found |
+-----------------------------------------------------------------------------+
nvidia-settings -q all
ERROR: The control display is undefined; Please run 'nvidia-settings --help' for usage information
xrandr
Cant't open display
nvidia-xconfig --query-gpu-info
Number of GPUs: 1
GPU #0:
Name : NVIDIA GeForce GTX 970
UUID : GPU-c0708496-5543-1d20-2272-745f740f7391
PCI BusID : PCI:38:0:0
Number of Display Devices: 1
Display Device 0 (TV-1):
EDID Name : FUS P27-8 TS UHD
Minimum HorizSync : 15.000 kHz
Maximum HorizSync : 160.000 kHz
Minimum VertRefresh : 24 Hz
Maximum VertRefresh : 120 Hz
Maximum PixelClock : 600.000 MHz
Maximum Width : 4096 pixels
Maximum Height : 2160 pixels
Preferred Width : 3840 pixels
Preferred Height : 2160 pixels
Preferred VertRefresh : 60 Hz
Physical Width : 600 mm
Physical Height : 340 mm
glxinfo | grep direct
Error: unable to open display
This is written in
Xorg.0.log
[ 16.558] (--) Log file renamed from "/var/log/Xorg.pid-1227.log" to "/var/log/Xorg.0.log"
[ 16.559]
X.Org X Server 1.21.1.3
X Protocol Version 11, Revision 0
[ 16.559] Current Operating System: Linux tim-manjaro 5.10.105-1-MANJARO #1 SMP PREEMPT Fri Mar 11 14:12:33 UTC 2022 x86_64
[ 16.559] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.10-x86_64 root=UUID=8f4653c7-4239-41ae-be62-e3a9f2272829 rw amd_iommu=on iommu=pt processor.max_cstate=5 rcu_nocbs=0_11 systemd.unified_cgroup_hierachy=true scsi_mod.use_blk_mq=1
[ 16.559]
[ 16.559] Current version of pixman: 0.40.0
[ 16.559] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 16.559] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 16.559] (==) Log file: "/var/log/Xorg.0.log", Time: Fri Apr 8 21:36:47 2022
[ 16.559] (==) Using config directory: "/etc/X11/xorg.conf.d"
[ 16.559] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 16.559] Parse error on line 3 of section Device in file /etc/X11/xorg.conf.d/20-nouveau.conf
"Driver " is not a valid keyword in this section.
[ 16.559] (EE) Problem parsing the config file
[ 16.559] (EE) Error parsing the config file
[ 16.559] (EE)
Fatal server error:
[ 16.559] (EE) no screens found(EE)
[ 16.559] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 16.559] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 16.559] (EE)
[ 16.559] (EE) Server terminated with error (1). Closing log file.
20-nouveau.conf
Section "Device"
Identifier "Nvidia card"
"Driver "nouveau"
EndSection
That is maybe a problem
I deleted 20-nouveau.conf.
Manjaro is starting again 
Thank you especially maycne.sonahoz and stephane