On Fri, May 01, 2015 at 06:23:32AM -0400, Maximilian Pichler wrote:
> On Fri, May 1, 2015 at 3:52 AM, Jonathan Gray <[email protected]> wrote:
> > There is currently no support for 5th generation Core i*/Broadwell
> > graphics in inteldrm(4). So all X operations with be unaccelerated.
>
> Thanks for the answer! Is this evident somewhere in the documentation?
> intel(4) explicitly lists "Intel(R) Iris(TM) Graphics: 5100/6100" as
> supported. Presumably this is only the case on Haswell.
>
> Also, I was curious how one can determine in general whether
> acceleration is enabled.
>
intel(4) is the xorg driver (xf86-video-intel). inteldrm(4) is the
kernel driver that does the mode setting and command submission.
If you have working acceleration you'll see inteldrm in your dmesg:
vga1 at pci0 dev 2 function 0 "Intel HD Graphics 4000" rev 0x09
intagp at vga1 not configured
inteldrm0 at vga1
drm0 at inteldrm0
inteldrm0: 1366x768
/var/log/Xorg.0.log will contain something along the lines of
[ 20.245] (II) intel(0): SNA initialized with Ivybridge (gen7, gt2) backend
[ 20.245] (==) intel(0): Backing store enabled
[ 20.245] (==) intel(0): Silken mouse disabled
[ 20.247] (II) intel(0): HW Cursor enabled
[ 20.247] (II) intel(0): RandR 1.2 enabled, ignore the following RandR
disabled message.
[ 20.250] (==) intel(0): DPMS enabled
[ 20.252] (II) intel(0): [DRI2] Setup complete
[ 20.252] (II) intel(0): [DRI2] DRI driver: i965
[ 20.252] (II) intel(0): [DRI2] VDPAU driver: i965
[ 20.252] (II) intel(0): direct rendering: DRI2 enabled
[ 20.252] (II) intel(0): hardware support for Present enabled
and glxinfo will be similiar to
direct rendering: Yes
...
Extended renderer info (GLX_MESA_query_renderer):
Vendor: Intel Open Source Technology Center (0x8086)
Device: Mesa DRI Intel(R) Ivybridge Mobile (0x166)
Version: 10.2.9
Accelerated: yes
Video memory: 1536MB
Unified memory: yes
Preferred profile: core (0x1)
Max core profile version: 3.3
Max compat profile version: 3.0
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.0
