sysfs files under /sys/devices/system/cpu/cpufreq/ disappear after upgrading kernel
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-snapdragon (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Bionic |
Invalid
|
Undecided
|
Unassigned |
Bug Description
sysfs files under /sys/devices/
Kernel: Linux dragon410c 4.15.0-
Steps:
1. Flash following image and boot the DUT
https:/
2. Enable proposed repository
3. Upgrade kernel to 4.15.0-1071
4. Reboot
5. Check file in /sys/devices/
Expected result:
Files are still there after upgrading kernel.
Actual result:
Files under /sys/devices/
Hardware infomation:
Dragonboard 410c
ip address: 10.101.51.17
description: | updated |
Changed in linux-snapdragon (Ubuntu): | |
status: | Incomplete → Invalid |
Changed in linux-snapdragon (Ubuntu Bionic): | |
status: | Incomplete → Invalid |
I can reproduce on 4.15.0-107.73, the current -updates kernel: dragon410c: ~$ ls /sys/devices/ system/ cpu/cpufreq/ dragon410c: ~$
ubuntu@
ubuntu@
So this is not a regression with current -proposed.
With 4.15.0-45.48 (the one from the ppisati image): dragon410c: ~$ ls /sys/devices/ system/ cpu/cpufreq/
ubuntu@
ondemand policy0