[System] RTX 3070 Mobile - Simply doesn't work on Kubuntu 25.04

[R.XIII]

Hi all,

I'm about to give up but this forum is my last resort.

My RTX 3070 GPU simply doesn't get detected after installing, looking online, reinstalling drivers from every possible way (software sources, cuda, terminal).

What am I doing wrong ? Please see below for more details about my system. I think at this point, I'll need a step-by-step guide fo finally be able to use my Discrete GPU for all work.

I'm on a Triple Monitor setup. One Vertical monitor, one main monitor in the middle, and one laptop as a third screen.

lspci -v -s 01:00.0
0000:01:00.0 VGA compatible controller: NVIDIA Corporation GA104M [GeForce RTX 3070 Mo
bile / Max-Q] (rev a1) (prog-if 00 [VGA controller])
DeviceName: Second VGA
Subsystem: ASUSTeK Computer Inc. Device 160c
Physical Slot: 1
Flags: bus master, fast devsel, latency 0, IRQ 202, IOMMU group 17
Memory at 85000000 (32-bit, non-prefetchable) [size=16M]
Memory at 6000000000 (64-bit, prefetchable) [size=8G]
Memory at 6200000000 (64-bit, prefetchable) [size=32M]
I/O ports at 4000 [size=128]
Expansion ROM at 86000000 [virtual] [disabled] [size=512K]
Capabilities: <access denied>
Kernel driver in use: nvidia
Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia

"About System" below.

Operating System: Ubuntu 12
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.8.3
Kernel Version: 6.14.0-22-generic (64-bit)
Graphics Platform: Wayland
Processors: 8 × 11th Gen Intel® Core™ i7-11370H @ 3.30GHz
Memory: 15.3 GiB of RAM
Graphics Processor 1: Intel® Iris® Xe Graphics
Graphics Processor 2: NVIDIA GeForce RTX 3070 Laptop GPU
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: ASUS TUF Dash F15 FX516PR_FX516PR
System Version: 1.0

Ps : by the way, no idea why it shows Ubuntu 12, I'm on Kubuntu 25.04. It also shows the Ubuntu logo in the "About System" section instead of the Kubuntu one.
Any ideas why ?
Ps2: I've got secure boot disabled but my installation is encrypted if that plays a role ?

Thank you everyone in advance.

[claydoh]

by the way, no idea why it shows Ubuntu 12, I'm on Kubuntu 25.04. It also shows the Ubuntu logo in the "About System" section instead of the Kubuntu one.
Any ideas why ?

You either installed Kubuntu's Plasma packages on top of an existing Ubuntu install, or you installed something Ubuntu on your Kubuntu. Or it is a small bug. The info is just pulled form a text file.


Kubuntu is a respin of Ubuntu, so this happening is purely cosmetic. The "12"
part I have no idea, that makes no sense

My RTX 3070 GPU simply doesn't get detected after installing

But it is, since it is showing in your system, info.

So, what exactly are your exact symptoms, exactly?
Specifically what sort of specific things have you tried, specifically?

Have you set the nvidia card as the main card in your Bios? At least to see how it works.
On the fly Switching between iGPU and dGPU may still be a hassle with Nvidia, but I have no recent experience with the brand. Others with similar hardware should chime in.

[R.XIII]

You either installed Kubuntu's Plasma packages on top of an existing Ubuntu install, or you installed something Ubuntu on your Kubuntu. Or it is a small bug. The info is just pulled form a text file.


Kubuntu is a respin of Ubuntu, so this happening is purely cosmetic. The "12"
part I have no idea, that makes no sense

I did no such thing, Kubuntu as been installed via USB on a formated disk. Any way to reset the "about system" section ?

But it is, since it is showing in your system, info.

So, what exactly are your exact symptoms, exactly?
Specifically what sort of specific things have you tried, specifically?

Have you set the nvidia card as the main card in your Bios? At least to see how it works.
On the fly Switching between iGPU and dGPU may still be a hassle with Nvidia, but I have no recent experience with the brand. Others with similar hardware should chime in.

The BIOS doesn't show any card, wether it is Intel Integrated Graphics or the GPU.
The symptoms are that whenever I launch a game or anything else, the GPU doesn't detect it. Also, my Intel and Nvidia Render Status plugin for the taskbar only shows Intel so the GPU isn't being used I believe.

Also, this :

Capabilities: <access denied>
Kernel driver in use: nvidia
Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia

It says "access denied", isn't something wrong here ? Main monitor is laggy whereas the laptop and the vertical monitor are butter smooth. It's weird.

[claydoh]

You will need to consult your laptop's documentation about manually selecting the GPU at the hardware level, if this is possible, or maybe do so via the Nvidia Settings application?
Again, hoping people with such hardware can chime in once they wake up as there may be other ways.

https://itsfoss.com/intel-nvidia-gra...switch-ubuntu/ maybe, except for the Gnome parts.

Capabilities: <access denied>

You would need sudo privileges to access that, which is to be expected, and not really needed with this command for listing basic hardware specs, but can be used if desired.

Any way to reset the "about system" section ?

Maybe:
https://www.kubuntuforums.net/forum/...lays-ubuntu-12

Another possibility is you have something missing somehow. Especially if you actually have the Debian logo as seen above.

[R.XIII]

https://www.kubuntuforums.net/forum/...lays-ubuntu-12

This helped. Thanks a lot.

You will need to consult your laptop's documentation about manually selecting the GPU at the hardware level, if this is possible, or maybe do so via the Nvidia Settings application?

The Nvidia settings application weirdly doesn't have the "on demand" and "performance" options for switching between both GPU's.

I tried to launch steam with the Nvidia GPU command line for proprietary drivers like showed in the other thread you shared with me. See the result below.

LX_VENDOR_LIBRARY_NAME=nvidia __NV_PRIME_RENDE
R_OFFLOAD=1 steam
steam.sh[36798]: Running Steam on ubuntu 25.04 64-bit
steam.sh[36798]: STEAM_RUNTIME is enabled automatically
setup.sh[36838]: Steam runtime environment up-to-date!
steam.sh[36798]: Using supervisor /home/red/.steam/debian-install
ation/ubuntu12_32/steam-runtime/amd64/usr/bin/steam-runtime-super
visor
steam.sh[36798]: Steam client's requirements are satisfied
CProcessEnvironmentManager is ready, 6 preallocated environment v
ariables.
[2025-06-30 17:25:24] Startup - updater built May 19 2025 19:50:5
8
[2025-06-30 17:25:24] Startup - Steam Client launched with: '/hom
e/red/.steam/debian-installation/ubuntu12_32/steam' '-srt-logger-
opened' '-nominidumps' '-nobreakpad'
CProcessEnvironmentManager is ready, 6 preallocated environment v
ariables.
[2025-06-30 17:25:24] Process started with command-line: '/home/r
ed/.steam/debian-installation/ubuntu12_32/steam' '-child-update-u
i' '-child-update-ui-socket' '8' '-srt-logger-opened' '-nominidum
ps' '-nobreakpad'
06/30 17:25:24 minidumps folder is set to /tmp/dumps
[2025-06-30 17:25:24] Using update UI: console
06/30 17:25:24 Init: Installing breakpad exception handler for ap
pid(steam)/version(0)/tid(36907)
[2025-06-30 17:25:24] Create window
[2025-06-30 17:25:24] Loading cached metrics from disk (/home/red
/.steam/debian-installation/package/steam_client_metrics.bin)
[2025-06-30 17:25:24] Using the following download hosts for Publ
ic, Realm steamglobal
[2025-06-30 17:25:24] 1. https://client-update.fastly.steamstatic
.com, /, Realm 'steamglobal', weight was 900, source = 'update_ho
sts_cached.vdf'
[2025-06-30 17:25:24] 2. https://client-update.akamai.steamstatic
.com, /, Realm 'steamglobal', weight was 100, source = 'update_ho
sts_cached.vdf'
[2025-06-30 17:25:24] 3. https://client-update.steamstatic.com, /
, Realm 'steamglobal', weight was 1, source = 'baked in'
06/30 17:25:24 minidumps folder is set to /tmp/dumps
[2025-06-30 17:25:24] Verifying installation...
[2025-06-30 17:25:24] Verifying file sizes only
[2025-06-30 17:25:24] Set percent complete: 0
[2025-06-30 17:25:24] Set percent complete: -1
[2025-06-30 17:25:24] Set status message: Verifying installation.
..
[----] Verifying installation...
[2025-06-30 17:25:24] Verification complete
UpdateUI: skip show logo
[2025-06-30 17:25:24] Destroy window

Steam logging initialized: directory: /home/red/.steam/debian-ins
tallation/logs

[2025-06-30 17:25:24] ProcessNextMessage: socket disconnected
[2025-06-30 17:25:24] No more messages are expected - exiting
XRRGetOutputInfo Workaround: initialized with override: 0 real: 0
xe8413870
XRRGetCrtcInfo Workaround: initialized with override: 0 real: 0xe
8411fc0
06/30 17:25:24 minidumps folder is set to /tmp/dumps
06/30 17:25:24 Init: Installing breakpad exception handler for ap
pid(steamsysinfo)/version(1747701111)/tid(36919)
Running query: 1 - GpuTopology
Response: gpu_topology {
gpus {
id: 1
name: "Intel(R) Iris(R) Xe Graphics (TGL GT2)"
vram_size_bytes: 8223401984
driver_id: k_EGpuDriverId_MesaIntel
driver_version_major: 25
driver_version_minor: 0
driver_version_patch: 3
}
gpus {
id: 2
name: "NVIDIA GeForce RTX 3070 Laptop GPU"
vram_size_bytes: 8589934592
driver_id: k_EGpuDriverId_NvidiaProprietary
driver_version_major: 575
driver_version_minor: 57
driver_version_patch: 8
}
gpus {
id: 3
name: "llvmpipe (LLVM 19.1.7, 256 bits)"
vram_size_bytes: 3221225472
driver_id: k_EGpuDriverId_MesaLLVMPipe
driver_version_major: 0
driver_version_minor: 0
driver_version_patch: 1
}
default_gpu_id: 1
}

Exit code: 0
Saving response to: /tmp/steambaiPDm - 170 bytes
steamwebhelper.sh[36928]: Using supervisor /home/red/.steam/root/
ubuntu12_32/steam-runtime/amd64/usr/bin/steam-runtime-supervisor
steamwebhelper.sh[36928]: Starting steamwebhelper under bootstrap
steamrt steam runtime via: /home/red/.steam/debian-installation/
steamrt64/steam-runtime-steamrt/_v2-entry-point
steamwebhelper.sh[36928]: Using CEF sandbox \(try with -no-cef-sa
ndbox if this fails\)
steamwebhelper.sh[36928]: Starting steamwebhelper with steamrt st
eam runtime at /home/red/.steam/debian-installation/steamrt64/ste
am-runtime-steamrt/_v2-entry-point
Steam Runtime Launch Service: starting steam-runtime-launcher-ser
vice
Steam Runtime Launch Service: steam-runtime-launcher-service is r
unning pid 37034
bus_name=com.steampowered.PressureVessel.LaunchAlo ngsideSteam
exec ./steamwebhelper -nocrashdialog -lang=en_US -cachedir=/home/
red/.steam/debian-installation/config/htmlcache -steampid=36905 -
buildid=1747701111 -steamid=0 -logdir=/home/red/.steam/debian-ins
tallation/logs -uimode=7 -startcount=0 -steamuniverse=Public -rea
lm=Global -clientui=/home/red/.steam/debian-installation/clientui
-steampath=/home/red/.steam/debian-installation/ubuntu12_32/stea
m -launcher=0 -use_xcomposite_workaround -no-restart-on-ui-mode-c
hange --valve-enable-site-isolation --enable-smooth-scrolling --d
isable-gpu-compositing --disable-gpu --password-store=basic --log
-file=/home/red/.steam/debian-installation/logs/cef_log.txt --dis
able-quick-menu --disable-features=SpareRendererForSitePerProcess
,DcheckIsFatal,BlockPromptsIfIgnoredOften,ValveFFm pegAllowLowDela
yHEVC
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/entry:70: error: un
expected identifier 'direction', expected character '}'
/usr/share/themes/Breeze-Dark/gtk-2.0/widgets/styles:36: error: i
nvalid string constant "combobox_entry", expected valid string co
nstant
Desktop state changed: desktop: { pos: 0, 0 size: 7920,3840
} primary: { pos: 2160, 375 size: 3840,2160 }
Caching cursor image for , size 24x24, serial 3, cache size = 0
reaping pid: 36906 -- sh