Hi

Hope you can help me.
I am a newbie to KDE and Linux, I have chosen Kubuntu 21.04 as my O/S

After many weeks of slowly adding Software and attaching Hardware and almost have everything setup.
My PC has decided to intermittently boot to a Black Screen, this happens about 7 times out of 10.
Sometimes it Boots to a normal desktop and everything works.

Most times its a Black screen and almost nothing works ?
The terminal works and I can run Firefox & spectacle works.
If i type dolphin it only opens the dolphin title bar not the full application.

I am sure you will need more Info, but as a newbie, I will need instructions ?

While this is frustrating to be so close to my completed install of Kubuntu, perhaps this is a good time to learn how to fix problems.
My previous job was Electronics fault finding, so I have a logical mind.

My PC is set to auto login.

Thanks
Gaz


Operating System: Kubuntu 21.04
KDE Plasma Version: 5.21.4
KDE Frameworks Version: 5.80.0
Qt Version: 5.15.2
Kernel Version: 5.11.0-18-generic
OS Type: 64-bit
Graphics Platform: X11
Processors: 4 ? Intel? Pentium? Silver J5040 CPU @ 2.00GHz
Memory: 7.4 GiB of RAM
Graphics Processor: Mesa Intel? UHD Graphics 605

What did you modify from the default Kubuntu installation?
You should always make a complete installation before making changes to the system, else it gets hard to reproduce where the error lies.

Hi,

Everything is standard software installs, mostly from Discover & Muon, the hardware was a cups printer.

I can see messages on Boot and shutdown but they are only on the screen for a fraction of a second.

Thanks

You should first update your system in a second screen (Ctrl+Alt+F2), log in with your credentials, then type the following:

Code: Select all

Sudo apt update && sudo apt upgrade

You can go back to the previous screen with Ctrl+Alt+F1.

Does this help?

Hi Thanks for that info, earlier today i changed the compositor from OpenGL 2.0 to XRender ( via System settings).

At the moment it hasn't failed at boot, so I will defer your recommendation, but if it does go wrong again I will try it.
I can also change it to OpenGL 3.1 and this still boots OK.
Are there any advantages as to which one of the three to use ?

But I would still like to see the messages that flash briefly on the screen when it boots and when it Shuts down, is there any way to do this ?
I tried removing quiet splash in the Grub menu, but it still boots as normal

thank you

gazbaz wrote:Are there any advantages as to which one of the three to use ?

Whichever works best for you - xrender does all the work on the CPU, instead of the graphics chip, so is the least preferred

But I would still like to see the messages that flash briefly on the screen when it boots and when it Shuts down, is there any way to do this ?
I tried removing quiet splash in the Grub menu, but it still boots as normal
/quote]

Did you update grub after the edit?
Also, try just hitting the Esc key when booting/shutting down, when you see the splash screen. This should toggle between text and the splash.