Obsidian / linux installation & monitor

Hi guys,
I’m a regular user of Obsidian on Windows and every thing works very well. I tried to install Linux version of Obsidian but I’m facing and issue with the resolution.

I’m wondering if it is because I don’t have enough memory on my memory card ?

Montreal, Canada

I regularly use Windows, Linux Mint, and Manjaro KDE, and do not have this issue. Possibly a custom css conflict? Do you have the same effect with custom css off?