This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1797154 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- 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/1797154 Title: arm64: snapdragon: reduce boot noise Status in linux package in Ubuntu: Incomplete Bug description: Impact: During boot on a Dragonboard410c using a recent Bionic or Cosmic kernel, there's some noise like: ... [ 3.665431] msm_dsi_phy 1a98300.dsi-phy: Failed to get supply 'vddio': -517 [ 3.669243] msm_dsi_phy 1a98300.dsi-phy: dsi_phy_regulator_init: failed to init regulator, ret=-517 [ 3.676180] msm_dsi_phy 1a98300.dsi-phy: dsi_phy_driver_probe: failed to init regulator ... or ... [ 4.192280] qcom,pm8916-wcd-spmi-codec 200f000.spmi:pm8916@1:codec@f000: Failed to get supply 'vdd-cdc-io': -517 [ 4.195660] qcom,pm8916-wcd-spmi-codec 200f000.spmi:pm8916@1:codec@f000: Failed to get regulator supplies -517 ... and similar. This is mainly due to DRM_MSM* and SND_QCOM_MSM* that were built-in, and tries to initialize before the voltage regulators are ready to work, resulting in a noisy bootlog. These patches factor out some code as modules, so when the kmods are loaded and initialized, regulators are already present and ready to attach - all these config changes shave around ~3K bytes from dmesg, making the bootlog easir to parse. Fix: Apply the attached patches and recompile How to test: Boot a patched kernel and check for the above noise in dmesg Regression potential: None, we are just turning some code into kmods, and turning off a couple of not used feature for this flavour - all the other flavours are untouched. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1797154/+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