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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1483320 Title: Migrate Broadwell to use i915_bpo Status in linux package in Ubuntu: Invalid Status in linux source package in Vivid: In Progress Bug description: There are several bugs affecting Broadwell generation graphics in the vivid kernel (3.19), but not found in 4.2rc which i915_bpo module is based on. In order to support our OEM partners (and other BDW users) it would make sense to migrate BDW to use i915_bpo instead. The known (public) bugs this would fix are: - screen is black after xrandr rotate command https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1446979 - changing the VT causes flicker https://bugs.freedesktop.org/show_bug.cgi?id=85583 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1450557 - GPU hangs on resume https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1468232 (and dupes, which I believe there are several of) - and some OEM machines can't always hotplug the HDMI output (no public bug AIUI) the migration should not be too risky, since i915_bpo is already used for Braswell which is same generation as (=based on) BDW. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1483320/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
