Public bug reported: [Testbed] Hardware: A Haswell platform laptop with an Amd Radeon R7 M265 graphics card. Connect an external monitor via HDMI port. Software: Ubuntu 14.04 xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1
[Reproducer] 1. Press FN + hot key to change the display mode. 2. Watching the built-in monitor. [Expect result] there should be 4 modes: Internal only -> extended mode -> mirror mode -> external only [Actual result] mirror-mode -> extended mode -> *black mode*[1] twice -> mirror mode -> internal only -> external only [1]: black mode means, the screen is black, backlight works well. Nothing displayed. Only cursor showed. It moves if I touch my mouse. [How reproducible] 100% with my laptop. [old version?] after downgrade to xserver-xorg-video-intel 2:2.99.910-0ubuntu1, the issue can not be reproduced. So I suppose it's a regression issue. ** Affects: xserver-xorg-video-intel (Ubuntu) Importance: Undecided Status: New ** Description changed: [Testbed] Hardware: A Haswell platform laptop with an Amd Radeon R7 M265 graphics card. Connect an external monitor via HDMI port. Software: Ubuntu 14.04 xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1 [Reproducer] 1. Press FN + hot key to change the display mode. 2. Watching the built-in monitor. [Expect result] there should be 4 modes: Internal only -> extended mode -> mirror mode -> external only [Actual result] - mirror-mode -> extended mode -> *black mode*[1] *2 -> mirror mode -> internal only -> external only + mirror-mode -> extended mode -> *black mode*[1] *2 -> mirror mode -> internal only -> external only [1]: black mode means, the screen is black, backlight works well. Nothing displayed. Only cursor showed. It moves if I touch my mouse. [How reproducible] 100% with my laptop. + + [old version?] + after downgrade to xserver-xorg-video-intel 2:2.99.910-0ubuntu1, the issue can not be reproduced. So I suppose it's a regression issue. ** Description changed: [Testbed] Hardware: A Haswell platform laptop with an Amd Radeon R7 M265 graphics card. Connect an external monitor via HDMI port. Software: Ubuntu 14.04 xserver-xorg-video-intel 2:2.99.910-0ubuntu1.1 [Reproducer] 1. Press FN + hot key to change the display mode. 2. Watching the built-in monitor. [Expect result] there should be 4 modes: Internal only -> extended mode -> mirror mode -> external only [Actual result] - mirror-mode -> extended mode -> *black mode*[1] *2 -> mirror mode -> internal only -> external only + mirror-mode -> extended mode -> *black mode*[1] twice -> mirror mode -> internal only -> external only [1]: black mode means, the screen is black, backlight works well. Nothing displayed. Only cursor showed. It moves if I touch my mouse. [How reproducible] 100% with my laptop. [old version?] after downgrade to xserver-xorg-video-intel 2:2.99.910-0ubuntu1, the issue can not be reproduced. So I suppose it's a regression issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1382494 Title: unexpected black screen when changing display mode. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1382494/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs