FYI, we noticed the following commit: https://github.com/0day-ci/linux Rhyland-Klein/power_supply-fix-return-value-of-get_property/20160614-050752 commit 30f4db08b1f61c5e928503d8dcb97da2d5317f13 ("power_supply: fix return value of get_property") on test machine: vm-vp-quantal-x86_64: 2 threads qemu-system-x86_64 -enable-kvm with 360M memory caused below changes: [ 12.955498] power_supply test_ac: uevent [ 12.956530] power_supply test_ac: POWER_SUPPLY_NAME=test_ac [ 12.957941] power_supply test_ac: driver failed to report `online' property: -11 [ 12.959881] __power_supply_register: Expected proper parent device for 'test_battery' [ 12.962486] power_supply test_battery: uevent [ 12.963614] power_supply test_battery: POWER_SUPPLY_NAME=test_battery [ 12.965248] power_supply test_battery: driver failed to report `status' property: -11 [ 12.990256] power_supply test_ac: power_supply_changed [ 12.990322] power_supply test_ac: power_supply_changed_work [ 12.990337] power_supply test_ac: power_supply_update_gen_leds 1 [ 12.990374] power_supply test_ac: uevent [ 12.990379] power_supply test_ac: POWER_SUPPLY_NAME=test_ac [ 12.990395] power_supply test_ac: prop ONLINE=1 FYI, raw QEMU command line is: qemu-system-x86_64 -enable-kvm -kernel /pkg/linux/x86_64-randconfig-s5-06141156/gcc-6/30f4db08b1f61c5e928503d8dcb97da2d5317f13/vmlinuz-4.7.0-rc1-00007-g30f4db0 -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-vp-quantal-x86_64-12/bisect_boot-1-quantal-core-x86_64.cgz-x86_64-randconfig-s5-06141156-30f4db08b1f61c5e928503d8dcb97da2d5317f13-20160614-10577-1b4w1vx-0.yaml~ ARCH=x86_64 kconfig=x86_64-randconfig-s5-06141156 branch=linux-devel/devel-spot-201606141122 commit=30f4db08b1f61c5e928503d8dcb97da2d5317f13 BOOT_IMAGE=/pkg/linux/x86_64-randconfig-s5-06141156/gcc-6/30f4db08b1f61c5e928503d8dcb97da2d5317f13/vmlinuz-4.7.0-rc1-00007-g30f4db0 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-vp-quantal-x86_64/quantal-core-x86_64.cgz/x86_64-randconfig-s5-06141156/gcc-6/30f4db08b1f61c5e928503d8dcb97da2d5317f13/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-vp-quantal-x86_64-12::dhcp drbd.minor_count=8' -initrd /fs/sdd1/initrd-vm-vp-quantal-x86_64-12 -m 360 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -pidfile /dev/shm/kboot/pid-vm-vp-quantal-x86_64-12 -serial file:/dev/shm/kboot/serial-vm-vp-quantal-x86_64-12 -daemonize -display none -monitor null Thanks, Xiaolong