Messages in this thread | | | From | "Rafael J. Wysocki" <> | Date | Thu, 5 Jul 2018 11:34:59 +0200 | Subject | Re: [REGRESSION 4.17] Spurious wakeup / reboot with power button |
| |
Hi,
On Thu, Jul 5, 2018 at 9:05 AM, Takashi Iwai <tiwai@suse.de> wrote: > Hi, > > we've got a regression report since 4.17 about the behavior of > power-off with the power button. When a machine is powered off with > the power button on desktop, it reboots after a few seconds instead of > power down. > > The manual power down via "systemctl poweroff" works fine, so it's > possibly some spurious wakeup by the power button action, and some > ACPI-related change is suspected. > The regression still remains in 4.18-rc3.
There are only a few ACPI commits directly related to power management between 4.16 and 4.17 and none of them looks particularly suspicious.
It looks like the power button state may not be cleared sufficiently after it's been pressed which is now visible for some reason.
How does the button poweroff work, exactly? I guess the event is collected by a user space demon which then triggers power of via sysfs or similar?
Thanks, Rafael
| |