#5 can be explained by that there is so much rendering go on, that the cache is completely thrashed (and if there were dirty cache lines they would be randomly over all the screen rather than concentrated in a small area around the cursor).
#4. Fine, but you're not telling the DDX that you have a scanout buffer either... Hmm. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1218735 Title: [intel] Bypass mode makes the cursor break up into horizontal line artefacts Status in Mir: New Status in XMir: New Status in “xorg-server” package in Ubuntu: New Bug description: Mir's bypass mode makes the X cursor break up into horizontal line artefacts. I can see some pixels updating where the cursor should be, but not all of them. There's a flickering ghost of where the mouse pointer was just a moment ago, comprised of small horizontal lines. I've *heard* this is an intel-specific bug due to particular caching behaviour of intel graphics, triggered by bypass (but only seen when bypassing XMir surfaces, not other Mir surfaces). WORKAROUND: 1. sudo -s 2. cd /usr/sbin 3. mv unity-system-compositor unity-system-compositor.bin 4. Now create a new file "unity-system-compositor" with: ---8<---8<---8<---8<---8<---8<---8<--- #!/bin/sh export MIR_BYPASS=0 exec $0.bin $* ---8<---8<---8<---8<---8<---8<---8<--- 5. chmod 755 unity-system-compositor To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1218735/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
