[Bug 83600] [HSW] HDMI monitor does not work via active DisplayPort adapter

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83600

--- Comment #10 from Chris Cheney <chris.cheney at gmail.com> ---
Using the current Ubuntu drm-intel-nightly build from today using commit
0db9cf7742874ee2c09a35b640c1bb04cb379eb6 I get the following the error instead.
The DP connected monitor still doesn't work until I run the xrandr commands
mentioned earlier in the bug.

[    4.475561] ------------[ cut here ]------------
[    4.475594] WARNING: CPU: 0 PID: 1481 at
/home/apw/COD/linux/drivers/gpu/drm/i915/i915_gem_execbuffer.c:125
eb_lookup_vmas.isra.15+0x345/0x3e0 [i915]()
[    4.475595] GPU use of dumb buffer is illegal.
[    4.475596] Modules linked in: bnep rfcomm bluetooth mxm_wmi intel_rapl
x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lr
w gf128mul glue_helper ablk_helper cryptd serio_raw lpc_ich shpchp 8250_fintek
wmi tpm_infineon mac_hid snd_hda_codec_realtek snd_hda_codec_hdmi
snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_cod
ec snd_hwdep i915 snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi video
snd_seq drm_kms_helper snd_seq_device drm snd_timer snd mei_me mei soundcore
parport_pc ppdev lp parport nls_iso8859_1 igb psmouse e100
0e firewire_ohci i2c_algo_bit dca firewire_core ahci ptp libahci crc_itu_t
pps_core
[    4.475621] CPU: 0 PID: 1481 Comm: Xorg Not tainted 3.18.0-994-generic
#201411290205
[    4.475622] Hardware name: Gigabyte Technology Co., Ltd.
Z87X-UD5H/Z87X-UD5H-CF, BIOS F10 08/21/2014
[    4.475623]  000000000000007d ffff8807ef40bb88 ffffffff827a5cd7
0000000000000007
[    4.475625]  ffff8807ef40bbd8 ffff8807ef40bbc8 ffffffff82074b0c
ffff8807f227eff0
[    4.475626]  ffff8807eed682c0 ffff8807eed681c0 ffff8807ef40bc78
ffff8807f0638400
[    4.475628] Call Trace:
[    4.475636]  [<ffffffff827a5cd7>] dump_stack+0x46/0x58
[    4.475641]  [<ffffffff82074b0c>] warn_slowpath_common+0x8c/0xc0
[    4.475642]  [<ffffffff82074bf6>] warn_slowpath_fmt+0x46/0x50
[    4.475650]  [<ffffffffc04ce605>] eb_lookup_vmas.isra.15+0x345/0x3e0 [i915]
[    4.475659]  [<ffffffffc04cf0e7>] i915_gem_do_execbuffer.isra.23+0x257/0x710
[i915]
[    4.475667]  [<ffffffffc04d0364>] ? i915_gem_execbuffer2+0x84/0x2d0 [i915]
[    4.475675]  [<ffffffffc04d03a6>] i915_gem_execbuffer2+0xc6/0x2d0 [i915]
[    4.475686]  [<ffffffffc03f9e46>] drm_ioctl+0x2e6/0x590 [drm]
[    4.475694]  [<ffffffffc04d02e0>] ? i915_gem_execbuffer+0x440/0x440 [i915]
[    4.475698]  [<ffffffff82202565>] do_vfs_ioctl+0x75/0x2c0
[    4.475700]  [<ffffffff8220cba5>] ? __fget_light+0x25/0x70
[    4.475702]  [<ffffffff82202841>] SyS_ioctl+0x91/0xb0
[    4.475704]  [<ffffffff827b352d>] system_call_fastpath+0x16/0x1b
[    4.475705] ---[ end trace 7a6ac4007f9db969 ]---

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