r297297 Haswell, libGL error: failed to open drm device, driver i965

[Anton Shterenlikht]

>From tommi.pernila at gmail.com Sun Mar 27 19:44:26 2016
>
>Hi Anton,
>
>try with these instructions:
>
>https://wiki.freebsd.org/Graphics/Update%20i915%20GPU%20driver%20to%20Linux%203.8
>
>note that the driver is already in CURRENT and there's no need to use the
>git repo drm-i915-update-38. Otherwise the instructions are correct.
>
>-Tommi

Since the driver is in the current already,
there's not much to do. The rest of instructions
are just to enable extra debugging.

I do get i915 and drm modules loading successfully on boot:

$ kldstat
Id Refs Address            Size     Name
 1   61 0xffffffff80200000 1ed35c0  kernel
 2    1 0xffffffff820d5000 18540    geom_bde.ko
 3    1 0xffffffff820ee000 9cc60    linux.ko
 4    3 0xffffffff8218b000 c678     linux_common.ko
 5    1 0xffffffff82198000 207d8    if_urtwn.ko
 6    1 0xffffffff821b9000 5338     urtwn-rtl8192cfwT.ko
 7    1 0xffffffff82421000 590a     fdescfs.ko
 8    1 0xffffffff82427000 4fee     ng_ubt.ko
 9    5 0xffffffff8242c000 ca3f     netgraph.ko
10    1 0xffffffff82439000 a568     ng_hci.ko
11    3 0xffffffff82444000 1066     ng_bluetooth.ko
12    1 0xffffffff82446000 e235     ng_l2cap.ko
13    1 0xffffffff82455000 1ce06    ng_btsocket.ko
14    1 0xffffffff82472000 3bcd     ng_socket.ko
15    1 0xffffffff82476000 a8c5     linprocfs.ko
16    1 0xffffffff82481000 9859b    i915kms.ko
17    1 0xffffffff8251a000 55a04    drm2.ko
18    4 0xffffffff82570000 26de     iicbus.ko
19    1 0xffffffff82573000 1cda     iic.ko
20    1 0xffffffff82575000 1e52     iicbb.ko
$

Thanks

Anton