Created attachment 877355 [details] bzip2 of 6.4.0-150600.10.4 dmesg with drm.debug=0x1e log_buf_len=1M from host p5bse w/ GK107 10de:0fc1 (In reply to Felix Miata from comment #26) > bzip2 of 6.4.0-150600.23.17.1 dmesg with drm.debug=0x1e log_buf_len=1M from > host big31 big31, with Radeon, was a typo. GK107 was in host big41. I moved GK107 to host p5bse in place of GF119 10de:107d, where I found two installed kernels between 600.4 and 600.12: kernel 6.4.0-150600.8 works as expected kernel 6.4.0-150600.10 oldest installed causing black screen and non-responsive keyboard @KMS start So bisect as far as I can manage is between these two kernels, after 22 Feb., by 18 Mar.