I am glad to stand corrected here. I thought all Baytrails were affected with a problem with i915drm. What version of the i915drm driver are you using?
Maybe I drag these back out for testing. Venue11 that I quote above has Braswell and should be unaffected.
grandpa you notice this in your examination of i915drm problems with certain Baytrail/ValleyView CPU graphics?
I have a workaround for Cherryview on 14.4-RELEASE running on Braswell architecture (which is a fancy way of calling an old Asus r517sa laptop with Intel HD graphics). Cherryview is often bundled in the code together with Valleyview but I haven't specifically looked for Baytrail in the code.
The workaround is described in this thread. Basically I installed a 14.4-RELEASE and git cloned ports tree 2026Q2 to get the drm-510-kmod port, modified the Makefile to remove the restriction for >= FreeBSD 14.2 and then for the /usr/src tree I did git switch to the source for 14.3, built the drm-510-kmod, switched back the src to 14.4 and rebooted.
I am also trying to trace the root cause to as why drm-515-kmod not is working on that same Asus laptop and so far I have traced it - as SirDice pointed out to me early in the thread - to a call that goes through the linuxkpi compatibility layer in the kernel. After reading from this Forum for a while I've come to realize that SirDice always points you to the right way.
/grandpa