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kde panel blinks all the time when I move mouse over it fast in kubuntu 20.04

cn flag

When I move my mouse fast it causes the panel to blink (rapidly disappears and appears).

When I move the mouse slowly over panel it does not blink.

Probably this is related to render of window contents.

i915 is in use and GLX is enabled.

slava@slava-Aspire-5742G:~$ lspci -k | grep -EA3 'VGA|3D|Display'
00:02.0 VGA compatible controller: Intel Corporation Core 
Processor Integrated Graphics Controller (rev 02)
        Subsystem: Acer Incorporated [ALI] Core Processor 
Integrated Graphics Controller
    Kernel driver in use: i915
    Kernel modules: i915


slava@slava-Aspire-5742G:~$ glxinfo | grep Device
    Device: Mesa DRI Intel(R) HD Graphics (ILK) (0x46)

How to fix this?

David avatar
cn flag
Do you know for sure you are using the right video driver?
cn flag
How to check this?
mangohost

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