Issues with multi-monitor setups when using glamor
Submitted by Clemens Eisserer
Assigned to Xorg Project Team
Created attachment 134261 screenshot
When using Xorg+glamor on my Intel Arrandale (gen5, Core-i5-540M) laptop running Fedora-26+updates, I get issues when using glamor which are not present when using SNA instead. (kernel 4.11.12, mesa 17.1.7).
Certain areas of the multi-monitor screen are simply not properly re-painted (screeshot attached).
I guess this is caused by the 4096 texture size limit of the Intel GPU, all monitors accumulated have a width of 4480px, whereas the width of the area that is not properly drawn is arround 300px.