[Bug 295788] graphics/drm-kmod: i915kms Hardware acceleration not working for Intel Braswell since >drm-510-kmod

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295788

--- Comment #40 from Roger Olofsson <[email protected]> ---
I compiled the kernel and added #option DDB and managed to hit ctrl alt escape
when Xorg is starting up.

I set a breakpoint at sys_ioctl 0xfffffe008ade7d30 and then single stepped
until the assertion came.

When I do ps the following looks interesting:

100241 D - 0xfffff8000899d000 [i915]
100242 D - 0xfffff8000899ee00 [i915-dp]
100243 D - 0xfffff8000483ee00 [card0-crtc0]
100244 D - 0xfffff80000bc7200 [card0-crtc1]
100245 D - 0xfffff80000bc7c00 [card0-crtc2]
100246 D - 0xfffff80004657900 [i915_modeset]

show proc for the above processes says
calltrap() at calltrap+0x8/frame 0xfffffe008ade7c10
---trap 0x3, rip = 0xfffff80be8480, rsp = 0xfffffe008ade7e08, rbp =
0xfffffe008ade7f30
sys_ioctl() at sys_ioctl/frame 0xfffffe008ade7f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe008ade7f30
---syscall (54, FreeBSD ELF64, ioctl), rip=0x829382a6a, rsp=0x82074d8d8,
rbp=0x82074d900

Wish I knew how to get more information here. It looks to be in the right place
after dbus -> sddm -> xorg -> modesetting

Roger

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