I posted a patch series for -modesetting that fixes this issue, and also adds TearFree support: https://gitlab.freedesktop.org/xorg/xserver/merge_requests/24
The patch series from Ville (https://patchwork.freedesktop.org/series/49663/) will however be what you are looking for, as it will not reduce the performance at all. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1714178 Title: Triple 4K monitor display failed (modesetting driver limited to 8192x8192) To manage notifications about this bug go to: https://bugs.launchpad.net/xorg-server/+bug/1714178/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
