[Bug 86462] 4k monitor at 48hz leads to blank screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86462

--- Comment #8 from Yuriy Vostrikov <delamonpansie at gmail.com> ---
trying to set 48hz mode with latest xf86-video-intel leads to following message
in dmesg

[ 1012.424441] [drm:drm_dp_mst_handle_down_rep] Got NAK reply: req 0x22, reason
0x09, nak data 0x03
[ 1012.425116] [drm:intel_dp_check_mst_status] got esi2 02 00 00
[ 1012.425118] [drm:intel_dp_check_mst_status] got esi 02 00 00
[ 1012.427638] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
[ 1012.428117] [drm:intel_dp_check_mst_status] got esi 02 10 00
[ 1012.428704] [drm:drm_dp_mst_handle_down_rep] Got NAK reply: req 0x22, reason
0x09, nak data 0x03
[ 1012.429385] [drm:intel_dp_check_mst_status] got esi2 02 00 00
[ 1012.429388] [drm:intel_dp_check_mst_status] got esi 02 00 00
[ 1012.431917] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
[ 1012.432396] [drm:intel_dp_check_mst_status] got esi 02 10 00
[ 1012.432979] [drm:drm_dp_mst_handle_down_rep] Got NAK reply: req 0x22, reason
0x09, nak data 0x03
[ 1012.433651] [drm:intel_dp_check_mst_status] got esi2 02 00 00
[ 1012.433654] [drm:intel_dp_check_mst_status] got esi 02 00 00
[ 1012.548185] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
[ 1012.548671] [drm:intel_dp_check_mst_status] got esi 02 10 00
[ 1012.549253] [drm:drm_dp_mst_handle_down_rep] Got NAK reply: req 0x22, reason
0x09, nak data 0x03
[ 1012.549924] [drm:intel_dp_check_mst_status] got esi2 02 00 00
[ 1012.549926] [drm:intel_dp_check_mst_status] got esi 02 00 00
[ 1012.552450] [drm:intel_dp_hpd_pulse] got hpd irq on port C - short
[ 1012.552920] [drm:intel_dp_check_mst_status] got esi 02 10 00
[ 1012.553493] [drm:drm_dp_mst_handle_down_rep] Got NAK reply: req 0x22, reason
0x09, nak data 0x03

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