Hi Vu Ngoc San, I've forwarded your bug upstream to Xorg for their assistance with this issue. Would you mind please subscribing to the upstream bug report in case they have questions or need you to test something? Then you can provide the info directly without me slowing down the process.
Also, upstream will likely request that you test against the git head version of the driver; if so you can use the link I provided above. ** Changed in: xserver-xorg-video-intel Importance: Undecided => Unknown Bugwatch: None => freedesktop.org Bugzilla #15508 Status: New => Unknown -- xorg very slow when rotated on external monitor (i965) https://bugs.launchpad.net/bugs/174650 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs