[DP] [SKL] 5k tiled dual DP (two-pipe, two-port) display sync issues
Submitted by Tomas Bzatek
Assigned to Intel GFX Bugs mailing list
Created attachment 125593
picture of the corruption
(this is a split-off from bug 95207 after solving modelines detection)
While modelines are properly detected now and native resolution can be set, the monitor shows corrupted image (see attached photo).
This is reproducible anytime with random level of corruption. So far I have never been able to get proper stable image. Lower resolutions (via single DP cable) work fine, so does Windows in native resolution (dual DP).
No interesting messages in the logs either, attached below.
This is Dell UP2715K, a 5k tiled monitor connected via two DP ports on a C236 board running Skylake Xeon.
I'll hang on IRC on #intel-gfx (nick: tbzatek) for direct debugging.
Attachment 125593, "picture of the corruption":