** Changed in: linux (Ubuntu Bionic) Importance: Undecided => High -- 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/1877657
Title: bionic snapdragon 4.15 snap failed Certification testing Status in linux package in Ubuntu: Invalid Status in linux source package in Bionic: Fix Committed Bug description: [SRU Justification] [Impact] snap certification testing failed with bionic/linux-snapdragon https://bugs.launchpad.net/bugs/1874763 After investigations by Kleber, failure was found to be from a drm driver which is compiled when CONFIG_DRM_MSM is set. Information reported from Paul Larson [1]: We have a cold reboot test in checkbox that seems to be failing with this kernel. The test runs the following commands to try to trigger a cold reboot: rtcwake --mode no -s 120 sleep 5 rtcwake -m show sleep 5 dbus-send --system --print-reply --dest=org.freedesktop.login1 /org/freedesktop/login1 "org.freedesktop.login1.Manager.PowerOff" boolean:true However, the system never fully reboots. On the serial console, I just see: ... Press enter to configure. [ 137.402465] systemd-shutdown[1]: Failed to wait for process: Protocol error [ 137.406163] systemd-shutdown[1]: Failed to wait for process: Protocol error I do have the ability to remotely remove power from the device and restore it, however after doing that, I get an oops on the serial console and the system never comes up. [1] https://bugs.launchpad.net/kernel-sru- workflow/+bug/1874763/comments/1 [Test] Run Certification Testing The tests are ran only with UC18, so a kernel snap is needed to either build a new image or promote it to edge. [Fix] The affected drm driver is set by CONFIG_DRM_MSM which is also set on bionic/linux Revert upstream commits on Bionic/linux: 0519bad6f34f drm/msm: Use the correct dma_sync calls in msm_gem 7318c5ef642b drm/msm: stop abusing dma_map/unmap for cache [Risk of Regression] Alternative solutions would need to be found for dma_sync calls in msm_gem and to avoid abusing dma_map/unmap for cache. The commits both came from upstream stable. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1877657/+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
