[Bug 109522] drm:intel_dp_start_link_train [i915] *ERROR* failed to enable link training

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109522

--- Comment #24 from howaboutsynergy at pm.me ---
actually the variation is strictly due to the time I spent until I turned on
the monitor! if I don't turn it on, it will still -110 

the only problem is that it keeps retrying for about 220 seconds(while the
monitor is still off):
[  117.970253] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR*
drm_dp_dpcd_access starting, stack:
...
[  134.801604] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  151.638435] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  168.473882] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  185.388476] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  202.299276] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  219.451539] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  236.282573] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  253.066295] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  269.861933] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  286.623649] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  303.417173] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  320.280230] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
...
[  337.188082] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Too many
retries(2000), giving up. First error: -110
[  337.188086] [drm:drm_dp_dpcd_access [drm_kms_helper]] *ERROR* Failed
ret='-110' after 2000 retries
...
[  337.188284] i915 Wakeref count: 62
...

looking at the caller stack, it's for different callers, but it gives up after
13 such attempts, apparently (unless that's the time the video card went to
sleep again, since I went away from the computer  - monitor was still turned
off)

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