201408-15387 Dell Latitude E7250, a Broadwell-U UMA system [8086:1616] With kittyhawk 2.0 image (3.19.0-26 #27), I can reproduce the following issues: 1. Normal <-> 180 display rotation, it would cause black screen. 2. VT switch, the screen will flick and the *ERROR* message could be found in dmesg 3. Resume from S3, you can see the screen before suspend, and GPU hang error message could be found in dmesg
However, I can't 100% reproduce the HDMI hot plug issue. Only 1 out of 10. Test result: With the kernel provided in #4 (tested with 3.19.0-26-generic_3.19.0-26.27+bpo0.2_amd64), all these issues are gone (HDMI hot plug works as expected too). But: * Call trace for i915_bpo could be found on boot in dmesg output * Call trace for i915_bpo could be found after connecting the HDMI cable * Call trace for i915_bpo could be found after connecting the DP cable * HDMI audio and DP audio are not working Please find the attachment for the detailed logs. For more information about the test cases, please refer to this private test report: https://certification.canonical.com/hardware/201408-15387/submission/105457/ ** Attachment added: "dmesg-201408-15387.zip" https://bugs.launchpad.net/ubuntu/vivid/+source/linux/+bug/1483320/+attachment/4443175/+files/dmesg-201408-15387.zip -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1483320 Title: Migrate Broadwell to use i915_bpo To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1483320/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
