Strange artifacts in panel text

[Metus]

Hello,

I just installed Linux Mint Cinnamon and I noticed some artifacts in the panel texts, see pictures. I have no idea where they come from. Additional drivers says that no third-party software is needed for my graphics chip. How can I remove these artifacts?

[naike]

I would start by taking a look at your fonts.
Maybe there's a way to "reset" your fonts in general.
Does changing fonts do anything?

[Metus]

I am not sure how to change the fonts in the menu. Changing the fonts in Cinnamon Preferences (not sure that this is the correct english term, I am using the german version) does not change anything in the panel.

[naike]

I've noticed, that sometimes cinnamon doesn't apply changes on the fly.
Sometimes you need to reload cinnamon after changing settings.
Alt+F2 and run "r", try to change fonts and then reload.
Could also try

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sudo fc-cache -f -v

to rebuild font cache.
But tbh, it sounds like a gpu driver problem.
What card/drivers do you have?

[Metus]

Changing fonts and reloading does not fix the issue. Output from lspci yields

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01:05.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RS600 [Radeon Xpress 1200 Series] (prog-if 00 [VGA controller])
        Subsystem: ASRock Incorporation Device 7941
        Flags: bus master, fast devsel, latency 32, IRQ 18
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        Memory at fdff0000 (64-bit, non-prefetchable) [size=64K]
        I/O ports at c000 [size=256]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel driver in use: radeon
        Kernel modules: radeon

[loudgefly]

Same problem here, with Cinnamon on both LMDE and LM 14, same graphic card (X1250), "radeon" driver.

[catweazel]

The first step should always be to let Cinnamon scale the panel.

Cinnamon Settings > Panel

[homerscousin]

I had some similar type artifacts back a couple months ago. Posted in the KDE subforum if you want to see my screenshot. End of January I think. Small white lines... was the title. Don't know what caused it or what cured it, but the system update did cure it. All those hundreds of update files.