[Bug 89658] [hsw dp mst]=?UTF-8?Q?=C2=A0Displays=20on=20T440s?=' external DP over MST regularly blank

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89658

--- Comment #7 from Tim Besard <tim.besard at gmail.com> ---
Just tried 4.3.0-rc5-ge3be426, same symptoms. although I have the impression
blanking occurs less frequently. But as with other kernels, the blanking event
doesn't generate any dmesg entry (with drm.debug=14).

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