the Linux XE driver for Intel Arc B580 is less forgiving than the official windows driver in regards to missing ReBAR support.
However I had to fight through multiple bluescreens until the latest version was installed (which contains a firmware update too). Now after it is installed it is stable.
Will probably try tomorrow again on linux and see if:
a) there was really a firmware update.
b) it also fixes the XE driver issues.







