[Bug 90804] System "forgets" about its DVI output

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90804

--- Comment #12 from Stephen Kitt <steve at sk2.org> ---
It looks like I'm going to have to bisect this anyway, the EDID workaround
isn't enough... This morning the screen was gone again!

There's nothing in the kernel logs overnight, but when I touched the keyboard
then started switching VTs to try to get the system back:

Jun 10 06:42:35 heffalump kernel: [30650.505896] platform HDMI-A-3: firmware:
direct-loading firmware edid/hp-lp2475w.edid
Jun 10 06:42:35 heffalump kernel: [30650.505918] [drm] Got external EDID base
block and 0 extensions from "edid/hp-lp2475w.edid" for connector "HDMI-A-3"

repeated 5 times, then

Jun 10 06:42:47 heffalump kernel: [30663.165540] [drm:drm_edid_block_valid]
*ERROR* EDID checksum is invalid, remainder is 3
Jun 10 06:42:47 heffalump kernel: [30663.165543] Raw EDID:
Jun 10 06:42:47 heffalump kernel: [30663.165544]        00 ff ff ff ff ff ff 00
22 f0 f7 26 01 01 01 01
Jun 10 06:42:47 heffalump kernel: [30663.165544]        25 12 01 03 80 36 23 78
ee ce 50 a3 54 4c 99 26
Jun 10 06:42:47 heffalump kernel: [30663.165545]        0f 50 54 a5 6b 80 81 40
a9 00 a9 40 b3 00 d1 00
Jun 10 06:42:47 heffalump kernel: [30663.165546]        01 01 01 01 01 01 28 3c
ff ff ff ff ff ff ff ff
Jun 10 06:42:47 heffalump kernel: [30663.165546]        ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
Jun 10 06:42:47 heffalump kernel: [30663.165547]        ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
Jun 10 06:42:47 heffalump kernel: [30663.165547]        ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff
Jun 10 06:42:47 heffalump kernel: [30663.165548]        ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff

(that came from the screen, the stored EDID is correct); then 11
"direct-loading firmware" messages, followed by

Jun 10 06:42:54 heffalump kernel: [30669.471054] [drm] HPD interrupt storm
detected on connector DP-2: switching from hotplug detection to polling

then another few dozen "direct-loading" messages with 2 invalid checksum
messages, and again

Jun 10 06:45:48 heffalump kernel: [30844.198498] [drm] HPD interrupt storm
detected on connector DP-2: switching from hotplug detection to polling

before I gave up and rebooted.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20150610/26a8ad93/attachment.html>