[Bug 90804] System "forgets" about its DVI output
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Wed Jun 10 04:59:14 PDT 2015
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.
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