[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 #1 from Roger Olofsson <[email protected]> ---
Adding some information tidbits.

1. On a working system (14.1-RELEASE with drm-510-kmod) a snippet of the the
Xorg.0.log looks this this:

[    28.782] (==) modeset(0): DPI set to (96, 96)
[    28.782] (II) Loading sub module "fb"
[    28.782] (II) LoadModule: "fb"
[    28.782] (II) Module "fb" already built-in
[    28.782] (II) UnloadModule: "scfb"
[    28.782] (II) Unloading scfb
[    28.783] (II) UnloadModule: "vesa"
[    28.783] (II) Unloading vesa
[    28.978] (==) modeset(0): Backing store enabled
[    28.978] (==) modeset(0): Silken mouse enabled
[    29.074] (II) modeset(0): Initializing kms color map for depth 24, 8 bpc.
[    29.074] (==) modeset(0): DPMS enabled

2. For 14.1-RELEASE, 14.2- RELEASE and all the way up to 15.0-RELEASE-p9 with
drm-515-kmod or any higher version drm-kmod the corresponding snippet looks
like this:

[    28.079] (==) modeset(0): DPI set to (96, 96)
[    28.079] (II) Loading sub module "fb"
[    28.079] (II) LoadModule: "fb"
[    28.079] (II) Module "fb" already built-in
[    28.079] (II) UnloadModule: "scfb"
[    28.079] (II) Unloading scfb
[    28.080] (II) UnloadModule: "vesa"
[    28.080] (II) Unloading vesa
[    28.087] (EE) 
Fatal server error:
[    28.087] (EE) Caught signal 6 (Abort trap). Server aborting
[    28.087] (EE) 
[    28.087] (EE) 
Please consult the The X.Org Foundation support 
         at http://wiki.x.org

Roger

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