[Bug 254472] graphics/drm-fbsd13-kmod Xorg crash on resume

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254472

--- Comment #8 from fred.ha11@yahoo.com ---
(In reply to Maurizio from comment #7)

Patch is definitely a major improvement and allows me to reliably
suspend/resume my X1 Carbon 4th gen. In testing a couple dozen times I did have
one complete freeze up though I am not at all sure it had anything to do with
the graphics. In the past (11.x and 12.x) I have been able to freeze up the
laptop by closing and opening the lid to quickly.

One question/observation: When I run the following command, sometimes there is
1 entry per suspend/resume cycle and sometimes there are 2. Seems odd, but I
haven't looked at the code.

 grep ' End of i915_gem_wait_for_idle' /var/log/messages

Apr 22 23:49:19 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 22 23:49:19 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 22 23:49:55 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 22 23:50:25 carbon kernel: End of i915_gem_wait_for_idle() in 1 tick(s)
Apr 22 23:54:24 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 22 23:54:24 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 22 23:59:47 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 00:25:22 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 00:25:57 carbon kernel: End of i915_gem_wait_for_idle() in 4101 tick(s)
Apr 23 00:25:57 carbon kernel: End of i915_gem_wait_for_idle() in 1 tick(s)
Apr 23 00:26:29 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 00:27:01 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 00:27:32 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 00:28:03 carbon kernel: End of i915_gem_wait_for_idle() in 4119 tick(s)
Apr 23 00:28:03 carbon kernel: End of i915_gem_wait_for_idle() in 1 tick(s)
Apr 23 00:28:35 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 00:29:03 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 00:29:37 carbon kernel: End of i915_gem_wait_for_idle() in 4129 tick(s)
Apr 23 00:29:37 carbon kernel: End of i915_gem_wait_for_idle() in 1 tick(s)
Apr 23 00:30:13 carbon kernel: End of i915_gem_wait_for_idle() in 4127 tick(s)
Apr 23 00:30:13 carbon kernel: End of i915_gem_wait_for_idle() in 1 tick(s)
Apr 23 00:30:49 carbon kernel: End of i915_gem_wait_for_idle() in 4101 tick(s)
Apr 23 00:30:49 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 00:31:20 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 00:31:52 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 00:34:43 carbon kernel: End of i915_gem_wait_for_idle() in 1 tick(s)
Apr 23 07:23:51 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 07:26:19 carbon kernel: End of i915_gem_wait_for_idle() in 4112 tick(s)
Apr 23 07:26:19 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 07:27:33 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 07:28:20 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 07:28:20 carbon kernel: End of i915_gem_wait_for_idle() in 0 tick(s)
Apr 23 07:29:42 carbon kernel: End of i915_gem_wait_for_idle() in 1 tick(s)
Apr 23 07:31:08 carbon kernel: End of i915_gem_wait_for_idle() in 1 tick(s)
Apr 23 07:32:05 carbon kernel: End of i915_gem_wait_for_idle() in 4114 tick(s)
Apr 23 07:32:05 carbon kernel: End of i915_gem_wait_for_idle() in 1 tick(s)

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