I did a clean install of BIONIC via ubuntu-18.04.1-server-arm64.iso on an ARM system and encountered this on first boot. I am happy to send logs but apport-collect states that I am not the owner
-- 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/1763817 Title: [SRU][BIONIC] after enabling cppc dmesg fills with "ACPI CPPC: PCC check channel failed. Status=0" Status in linux package in Ubuntu: Incomplete Bug description: [Impact] On ARM64 systems enabling cppccontrol=1 in firmware, the dmesg fills with messages like: [ 4083.960332] ACPI CPPC: PCC check channel failed. Status=0 [ 4085.546975] ACPI CPPC: PCC check channel failed. Status=0 [ 4113.939921] ACPI CPPC: PCC check channel failed. Status=0 [ 4115.531777] ACPI CPPC: PCC check channel failed. Status=0 We lose any useful data in dmesg and on the console. [Fix] upstream commit fixes this issue: commit 3d41386d556db9f720e00de3e11e45f39cb5071c Author: George Cherian <[email protected]> Date: Fri Mar 23 03:30:31 2018 -0700 cpufreq: CPPC: Use transition_delay_us depending transition_latency [Testing] -- before kernel patch -- Both console output and dmesg are filled with the message ACPI CPPC: PCC check channel failed. Status=0 [ 85.969952] ACPI CPPC: PCC check channel failed. Status=0 [ 81.888445] cloud-init[4810]: Cloud-init v. 18.2 running 'modules:final' at Fri, 13 Apr 2018 19:11:57 +0000. Up 80.71 seconds. [ 81.888625] cloud-init[4810]: Cloud-init v. 18.2 finished at Fri, 13 Apr 2018 19:11:58 +0000. Datasource DataSourceMAAS [http://10.228.68.5:5240/MAAS/metadata/]. Up 81.69 seconds [ OK ] Started Execute cloud user/final scripts. [ OK ] Reached target Cloud-init target. [ 86.230432] ACPI CPPC: PCC check channel failed. Status=0 [ 86.701943] ACPI CPPC: PCC check channel failed. Status=0 [ 86.773668] ACPI CPPC: PCC check channel failed. Status=0 [ 87.369958] ACPI CPPC: PCC check channel failed. Status=0 [ 87.733361] ACPI CPPC: PCC check channel failed. Status=0 [ 88.207372] ACPI CPPC: PCC check channel failed. Status=0 ubuntu@starbuck:~$ uname -a Linux starbuck 4.15.0-13-generic #14-Ubuntu SMP Sat Mar 17 13:44:36 UTC 2018 aarch64 aarch64 aarch64 GNU/Linux -- after kernel patch -- OK ] Started Apply the settings specified in cloud-config. Starting Execute cloud user/final scripts... [ 67.178425] cloud-init[3688]: Cloud-init v. 18.2 running 'modules:final' at Fri, 13 Apr 2018 20:41:15 +0000. Up 65.98 seconds. [ 67.200190] cloud-init[3688]: Cloud-init v. 18.2 finished at Fri, 13 Apr 2018 20:41:15 +0000. Datasource DataSourceMAAS [http://10.228.68.5:5240/MAAS/metadata/]. Up 66.83 seconds [ OK ] Started Execute cloud user/final scripts. [ OK ] Reached target Cloud-init target. Ubuntu Bionic Beaver (development branch) starbuck ttyAMA0 starbuck login: ubuntu@starbuck:~$ uname -a Linux starbuck 4.15.0-15-generic #16~lp1763817+build.1 SMP Fri Apr 13 19:54:10 UTC 2018 aarch64 aarch64 aarch64 GNU/Linux [Regression Potential] None. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763817/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
