I created a V2 test kernel since reverting only 0ed67cf and 53dfa1d still exhibits the bug. The V2 test kernel has the following four commits reverted:
86ad82b UBUNTU: SAUCE: i915_bpo: drm/i915: Split atomic wm update to pre and post variants
059c4a4 UBUNTU: SAUCE: Migrate Broadwell to i915_bpo.
53dfa1d UBUNTU: SAUCE: i915_bpo: Set ddi_pll_sel in DP MST path
0ed67cf UBUNTU: SAUCE: i915_bpo: drm/i915: Don't use link_bw for PLL setup
I created a V2 test kernel since reverting only 0ed67cf and 53dfa1d still exhibits the bug. The V2 test kernel has the following four commits reverted:
86ad82b UBUNTU: SAUCE: i915_bpo: drm/i915: Split atomic wm update to pre and post variants
059c4a4 UBUNTU: SAUCE: Migrate Broadwell to i915_bpo.
53dfa1d UBUNTU: SAUCE: i915_bpo: Set ddi_pll_sel in DP MST path
0ed67cf UBUNTU: SAUCE: i915_bpo: drm/i915: Don't use link_bw for PLL setup
This test kernel can be downloaded from:
http:// kernel. ubuntu. com/~jsalisbury /lp1500751