r/Kubuntu

Unable to change power profile in Kubuntu 26.04 LTS, both via GUI and command line. When I try to change via konsole using command "powerprofilesctl set performance", I get error message:

**

Failed to communicate with power-profiles-daemon: g-io-error-quark: GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._g_2dio_2derror_2dquark.Code13: Failed to activate CPU driver 'amd_pstate': Error writing '/sys/devices/system/cpu/cpufreq/policy11/boost': Invalid argument (13)

**

CPU: AMD Radeon RX 6700 XT

Anyone have idea of what's going on? Optimally, I'd like to switch between the power profiles using the KDE interface in Power and battery. Thanks. :)

The number of times I had to hard switch off my machine is incomparable to any other install/upgrade. Mitigating one issue lead to another, then another and after lot of googling, now the system has almost desirable setup. I am posting this in case someone with similar setup might find it helpful. To start with, I appreciate KDE/Kubuntu, so the the time spent to get to a stable state was worth it. Root cause is RX-7900xtx driver bugs paired with 360hz monitor.

With Kubuntu 25.10 + plasma-wayland I hit the pageflip_timout issue, but after setting amdgpu.dcdebugmask=0x10 amdgpu.gpu_recovery=1 issue resolved.

Problem: Upgraded to 26.04, noticed mini-freezes (known issue).

Solution: Upgrade kernel (7.0.11).

Problem: AMD gpu flip_done random GPU hang is back, TTY switching not working. Changing settings for adaptive-sync, dcdebugmask values, power-profiles via LACT don't solve it.

Solution: installed plasma-x11, set autologin to avoid not tech savvy spouse dropping into wayland session unintentionally.

Problem: Repeated freezes in plasma-x11 session at login. Network connection notification is crashing the desktop (QTextDocumentFragment::fromHtml (libQt6Gui)).

Solution: Disable network notifications in system settings.

Problem: Created a new user just for gaming, installed Hyperland session for VRR, try to switch user, and hard crash. Repeats everytime (sddm-helper: Failed to take control of "/dev/tty1"). Maybe something to do with SDDM and plasma-x11 autologin, changing MinimumVT > 1 has no effect.

Solution: Disable auto-login (not desirable).

Side effect of hard switch-offs eventually resulted in boot dropping into emergency mode caused by two data partitions failing to mount. Should have setup ssh server, instead of thinking "this should be fixed now". Sufficient time has passed now without experiencing any issues.. so fingers crossed for 26.04.1

Dolphin is bothering me regarding MTP. It doesn't copy files in any particular order. This causes an issue on my phone with the image viewer which orders by file timestamp. And it also updates timestamps to the moment of copying, which for this case would be acceptable since it then results in a proper viewing order. But an option to preserve timestamps would be nice.

I read a report where Windows 7 did preserve timestamps via MTP, without needing to tweak it to do that.

Interestingly, the other way, from MTP device, it preserves the timestamp.

I just installed "Kubuntu 26.04 LTS - Plasma 6" and have the Steam snap package installed thru Discover. I installed Gamescope thru cmd using "sudo apt install gamescope" and it seemed to be successful. Running "gamescope --version" yields:

[gamescope] [Info]  console: gamescope version 3.16.20+ds-1 (gcc 15.2.0)

Once I put my argument into Steam's launch options - the "play" button seems to try the gamescope cmd and fail before returning back to "play".

Currently running the open kernel 595 nvidia driver from the driver manager. My launch argument is as follows. It was working on Fedora before Fedora completely nuked itself and I decided to try Kubuntu.

gamescope -w 1280 -h 720 -r 144 -o 30 -b --adaptive-sync -- %command%

Appreciate any help!

With my new GPU, rx 5500 xt 8gb, the system crashes while playing Cyberpunk 2077, and while I haven't tested any more modern games because I don't play any, this issue was still a thing in my previous GPU, except more prevalent.

However, sometimes on low settings, the computer won't crash, it will give me the "desktop effects were restarted" error, as the game freezes for a few seconds. My guess is that the system crashes are stronger version of that issue.

I have a pretty updated Kubuntu install, latest kernel and most everything related to drivers. What could I try to do to fix the problem?

I install kde kubuntu , kde neon and not work.

My logtop info;

Processor 13th Gen Intel(R) Core(TM) i5-13450HX (2.40 GHz)

Installed RAM 16,0 GB (15,7 GB usable)

Graphics card NVIDIA GeForce RTX 5060 Laptop GPU (8 GB)

Intel(R) UHD Graphics (128 MB)

Storage 77 GB of 954 GB used

Device ID 8B78D0CE-14E6-4BA9-89EB-FCBE1BF079E7

Product ID 00342-22602-01090-AAOEM

System type 64-bit operating system, x64-based processor

Pen and touch No pen or touch input is available for this display

like install KDE kubuntu

Problem;

https://preview.redd.it/cdovnydp62ah1.jpg?width=3060&format=pjpg&auto=webp&s=b76dfe0927f9cf37d0d09f2df40d0270831203fe

Please tell me what to do because I don't know anymore.

I am a software developer using linux mint for few months. I am linux (Ubuntu) user for nearly 18 years. But have been using Linux mint as my daily driver for last 9-10 months. I feel it's very stable. But just getting itch to try Kubuntu. Are there any advantages of using Kubuntu over Linux mint? One advantage I got to know from using live USB of Kubuntu. Live USB of Kubuntu could open my OneDrive folder from dual boot windows 11 partition which Linux mint is not able to do even on bare metal setup. Please list few more if there are any.

I have a laptop with NVIDIA RTX 5060 (it doesn't have an iGPU), and I installed Kubuntu 25.10. My question is: how can I enable hardware accelerated video decoding and encoding in KDE Plasma Wayland session? Can someone help me? Thanks in advance!