Comment 8 for bug 1483320

201409-15487 - Dell Latitude E5450, another Broadwell-U UMA system with HDMI and VGA port.
With kittyhawk 2.0 image (3.19.0-26 #27), I can only reproduce the rotation issue.

The GPU hang won't happen on resume from suspend, no error message were found for it.
The VT switch issue can't be reproduced by logging out the system as well, no error message were found.
And the HDMI hotplug issue can't be reproduced.

With the kernel provided in #4 (tested with 3.19.0-26-generic_3.19.0-26.27+bpo0.2_amd64), the rotation issues is gone

But:
* Call trace for i915_bpo could be found on boot in dmesg output
* Call trace for i915_bpo could be found after connecting the HDMI cable
* Call trace for i915_bpo could be found after connecting the dsub cable
* HDMI audio is not working
* Unable to use "External only" video mode with D-sub, error message:
Aug 12 05:21:07 KH0809 kernel: [ 206.031773] [drm:intel_dp_start_link_train [i915_bpo]] *ERROR* too many voltage retries, give up
Aug 12 05:21:07 KH0809 kernel: [ 206.120744] [drm:intel_pipe_config_compare [i915_bpo]] *ERROR* mismatch in base.adjusted_mode.crtc_clock (expected 148500, found 74249)

(Other 3 video modes are working well, and there is no issue with HDMI for these four modes)

Please find the attachment for the detailed logs.

For more information about the test cases, please refer to this private test report:
https://certification.canonical.com/hardware/201409-15487/submission/105467/

Detailed information for the VGA controller:
00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 08) (prog-if 00 [VGA controller])
 Subsystem: Dell Device [1028:062b]
 Flags: bus master, fast devsel, latency 0, IRQ 51
 Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
 Memory at e0000000 (64-bit, prefetchable) [size=256M]
 I/O ports at f000 [size=64]
 Expansion ROM at <unassigned> [disabled]
 Capabilities: <access denied>
 Kernel driver in use: i915