Since the 3 patches were added:
i965: Use MESA_FORMAT_B8G8R8X8_SRGB for RGB visuals
i965: Add B8G8R8X8_SRGB to the alpha format override
i965: Add MESA_FORMAT_B8G8R8X8_SRGB to brw_format_for_mesa_format
Kwin no longer starts correctly on my Skylake system with FW5.17 & Plasma 5.5
I can still see the console and the mouse renders and I can see a popup telling me the wifi has connected. If I disable compositing I can logon, but opening the compositor settings the control panel segfaults in i965_drv.so
Going back to the previous commit before these patches solves the issue for me
Please let me know if you'd like any more details or logs
Just to be clear I only need to revert 839793680f99b8387bee9489733d5071c10f3ace
See also bug 92759, comment 13
I've sent a revert for the patch because it looks like it's not going to be trivial to fix properly and this bug is worse than the original bug it was fixing.
I've pushed the revert.