[Bug 60637] [ivb hsw] DP link training errors on DPMS off (crtc disable)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=60637

--- Comment #32 from da_audiophile at yahoo.com ---
I should add that I just now experienced the same dmesg errors but without the
screen going into standby at all.  Here I powered up the machine with the
monitor off while I made some coffee... upon turning the monitor on, and
logging in, I noticed the timestamp in the dmesg errors (~4 min) which was
about the time I came into the office and switched the monitor on.

[   12.160460] e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control:
Rx/Tx
[   12.160488] IPv6: ADDRCONF(NETDEV_CHANGE): eno1: link becomes ready
[  221.267000] [drm:intel_dp_start_link_train] *ERROR* too many full retries,
give up
[  221.274440] [drm:ivybridge_set_fifo_underrun_reporting] *ERROR* uncleared
fifo underrun on pipe A
[  221.274449] [drm:ivb_err_int_handler] *ERROR* Pipe A FIFO underrun
[  221.276336] [drm:intel_dp_start_link_train] *ERROR* too many full retries,
give up
[  221.285532] [drm:intel_dp_start_link_train] *ERROR* too many full retries,
give up
[  221.294636] [drm:intel_dp_start_link_train] *ERROR* too many full retries,
give up
[  221.303589] [drm:intel_dp_start_link_train] *ERROR* too many full retries,
give up
[  221.312449] [drm:intel_dp_start_link_train] *ERROR* too many full retries,
give up
[  221.321306] [drm:intel_dp_start_link_train] *ERROR* too many full retries,
give up
[  221.321499] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP,
aborting

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