It has been reported that Hyper-V VM users can unintentionally abort hibernation by mouse or keyboard movements. To address this issue, we have decided to remove the wakeup events for the Hyper-V keyboard and mouse driver. However, this change introduces another problem: Suspend-to-Idle brings the system down with no method to wake it back up. Given that there are no real users of Suspend-to-Idle in Hyper-V, we have decided to disable this feature for VMBus. This results in: $echo freeze > /sys/power/state > bash: echo: write error: Operation not supported The keyboard and mouse were previously registered as wakeup sources to interrupt the freeze operation in a VM. Since the freeze operation itself is no longer supported, we are disabling them as wakeup events. This patchset ensures that the system remains stable and prevents unintended interruptions during hibernation. --- Changes in v4: * Make keyboard and mouse wakeup capable by adding device_set_wakeup_capable but not enabling them as wakeup sources. https://lore.kernel.org/lkml/Zv-j0qtWXsDz4Hah@xxxxxxxxxx/ * Remove device_wakeup_init() call in mousevsc_remove() v3:https://lore.kernel.org/lkml/1727685708-3524-1-git-send-email-ernis@xxxxxxxxxxxxxxxxxxx/ Changes in v3: * Add 'Cc: stable@xxxxxxxxxxxxxxx' in sign-off area. v2:https://lore.kernel.org/lkml/1727683917-31485-1-git-send-email-ernis@xxxxxxxxxxxxxxxxxxx/ Changes in v2: * Add "#define vmbus_freeze NULL" when CONFIG_PM_SLEEP is not enabled. * Change commit message to clarify that this change is specifc to Hyper-V based VMs. v1:https://lore.kernel.org/lkml/1726176470-13133-1-git-send-email-ernis@xxxxxxxxxxxxxxxxxxx/ --- Erni Sri Satya Vennela (3): Drivers: hv: vmbus: Disable Suspend-to-Idle for VMBus Input: hyperv-keyboard - disable as wakeup source HID: hyperv: disable as wakeup source drivers/hid/hid-hyperv.c | 3 +-- drivers/hv/vmbus_drv.c | 16 +++++++++++++++- drivers/input/serio/hyperv-keyboard.c | 2 +- 3 files changed, 17 insertions(+), 4 deletions(-) -- 2.34.1
