Ok it's more or less fixed although the bug should stay opened: /usr/share/fonts/X11/misc/fonts.dir contained this ligne: cursor.pcf.gz-artwiz cursor By comparing it to my other machine I realized that renaming the file cursor.pcf.gz-artwiz to cursor.pcf.gz and modifying the fonts.dir file adequately resolved the issue. This is a hack and I don't really understand where the problem came from. I'm sure this problem does not come from my tampering with system files because I try avoiding such messing around as much as possible. I beleive gcursor might be the culprit here...
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