Created attachment 3952 [details] linux-intel kernel log When booting on CherryTrail hardware with linux-intel 4.9.30, drm driver time outs during initialization [ 5.539880] sd 0:0:0:0: [sda] Attached SCSI removable disk [ 14.933791] [drm:drm_atomic_helper_commit_cleanup_done] *ERROR* [CRTC:42:pipe B] flip_done timed out [ 14.952792] Console: switching to colour frame buffer device 240x67 [ 25.685447] [drm:drm_atomic_helper_commit_cleanup_done] *ERROR* [CRTC:42:pipe B] flip_done timed out [ 35.925117] [drm:drm_atomic_helper_commit_cleanup_done] *ERROR* [CRTC:42:pipe B] flip_done timed out [ 37.041314] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device This appears to be a known kernel bug: https://bugs.freedesktop.org/show_bug.cgi?id=98810. Steps to re-create ------------------ $ git clone -b pyro git://git.yoctoproject.org/poky $ git clone -b pyro git://git.yoctoproject.org/meta-intel $ source poky/oe-init-build-env $ bitbake-layers add-layer ../meta-intel $ echo 'MACHINE = "intel-corei7-64"' >> conf/local.conf $ bitbake core-image-base $ sudo dd if=tmp/deploy/images/intel-corei7-64/core-image-base-intel-corei7-64.wic of=/dev/sdd bs=1MB $ sync Now boot hardware with wic image. Observe 30s delay in getting to login prompt. Log is attached as linux-intel.4.9.30.log. Workaround ---------- Use linux-yocto kernel by adding following step $ echo 'PREFERRED_PROVIDER_virtual/kernel = "linux-yocto"' >> conf/local.conf Build re-build image and boot hardware with wic image. Observe no extra delay in getting to login prompt.
Please file this with the github Issue tracker since that goes directly to the kernel team working on linux-intel. https://github.com/01org/linux-intel-4.9/issues
Done. See https://github.com/01org/linux-intel-4.9/issues/13
Issue is with the Intel Production Kernel issue, due to the DRM backport support. Closing this as moved the Production Kernel Issue tracking.
see previous comment
Production kernel team have closed their issue as "filed in error" as they do not support CherryTrail.