Severe video glitch with Adler-Lakee-UP3 GT2 [Iris Xe Graphics]
I have a HP Elite x360 1049 G9 2-in-1 notebook with an intel Adler-Lakee-UP3 GT2 [Iris Xe Graphics] video card, running fedora 38.
Since commit e2b789bc3dc34edc in stable (or e1c71f8f918047c in main), I have a severe video glitch: sometimes, when the content of the screen changes (moving the mouse is often sufficient), a large vertical band flashes on the right of the screen. The band occupies about 20% of the screen, and is made of random, changing pixels. I have opened a fedora bug, https://bugzilla.redhat.com/show_bug.cgi?id=2203549, with a small attached video demonstrating the problem.
- Reverting the commit in question removes the problem
- booting with i915.psr_safest_params=1 or i915.enable_psr=0 removes the problem
I am attaching
- the output of lspci -vv for the video card. (Obtained with my working kernel: fedora packaged 2.6.15 booted with i915.psr_safest_params=1)
- the output of dmesg obtained while booting vanilla 6.3.2 with options log_buf_len=4M drm.debug=0xe (and without i915.psr_safest_params). The visual glitch did appear a couple of times before the dmesg was generated.
EDIT: regressing commit is e1c71f8f9180 ("drm/i915: Fix fast wake AUX sync len")