Public bug reported:
## Problem
On my Acer TravelLite TL14-42M laptop, Ubuntu suspend immediately wakes
up after 1-2 seconds.
Running:
systemctl suspend
The laptop enters suspend successfully but wakes immediately.
Windows dual boot on the same hardware suspends correctly.
## Hardware
Laptop: Acer TravelLite TL14-42M
CPU: AMD Ryzen 7 7730U
BIOS:
1.07.06RAC1
OS:
Ubuntu 24.04.4 LTS
Kernel:
6.17.0-1030-oem
## Suspend mode
cat /sys/power/mem_sleep
Output:
[s2idle]
## Investigation
Using:
cat /sys/kernel/debug/wakeup_sources
The wakeup source was identified as:
i2c-ELAN0415:00
The device is:
ELAN0415 I2C HID touchpad
## Workaround
The issue can be fixed by unbinding the touchpad before suspend and
rebinding after resume:
Before suspend:
echo i2c-ELAN0415:00 | sudo tee /sys/bus/i2c/drivers/i2c_hid_acpi/unbind
After resume:
echo i2c-ELAN0415:00 | sudo tee /sys/bus/i2c/drivers/i2c_hid_acpi/bind
I created a systemd sleep hook which performs this automatically.
After applying this workaround, suspend works correctly.
## Additional logs
Wakeup source before fix:
i2c-ELAN0415:00
The issue is reproducible on the OEM kernel as well:
6.17.0-1030-oem
The AMD S0ix state reports successful entry and exit, so the problem appears
related to the ELAN I2C HID touchpad wake handling.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2162061
Title:
ELAN0415 I2C HID touchpad causes immediate wake after suspend on AMD
laptop
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