I had problem with the device driver i2c-WACF2200 spamming the logs with any touchscreen input (and quite often when not touching it) I was seemingly also bringing the laptop out of supspeng (Lenovo Ideapad 5)
I was having no luck disabling the device or driver using the device name, and I couldn't unload the associated module without losing the touchpad too (i2c_hid_acpi) Even when I was able to disable the Wacom Pen and Finger devices, it didn't stop the driver spamming logs when reacting to the touch screen. I wasn't getting anywhere until, finally, the posts here led me to trying the driver name and stumbling on the right device path with some added inspired guesswork. I got the driver unbound, and no more logging but the price is no touchscreen, which I can live with if I have to. tacking on this long response as it took me far far too many hours to finally find a targeted workaround for this problem. hoping to others the same pain. command to disable i2c-WACF2200:00 driver bound to the i2c_hid_acpi module echo "i2c-WACF2200:00" > /sys/bus/i2c/drivers/i2c_hid_acpi/unbind -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.6 in Ubuntu. https://bugs.launchpad.net/bugs/1900254 Title: fails to suspend unless I unbind a device from elants_i2c driver Status in Linux: Fix Released Status in linux-oem-5.6 package in Ubuntu: Confirmed Status in linux-signed-hwe-5.8 package in Ubuntu: New Bug description: systemctl suspend stopped working successfully. The error message from journalctl -r is: Oct 17 17:26:27 jeanna-pc kernel: PM: Device i2c-ELAN0001:00 failed to suspend: error -16 Oct 17 17:26:27 jeanna-pc kernel: PM: dpm_run_callback(): acpi_subsys_suspend+0x0/0x60 returns -16 Oct 17 17:26:27 jeanna-pc kernel: printk: Suspending console(s) (use no_console_suspend to debug) Oct 17 17:26:27 jeanna-pc kernel: Freezing remaining freezable tasks ... (elapsed 0.300 seconds) done. This can be fixed with: echo i2c-ELAN0001:00 >/sys/bus/i2c/drivers/elants_i2c/unbind After this, systemctl suspend works again. After the next reboot, this situation repeats again. (Offtopic: As concerns the touchpad on this new Lenovo laptop, it never worked after Ubuntu installation -- with the default kernel or this one, no matter which one.) ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-unsigned-5.6.0-1021-oem 5.6.0-1021.21 ProcVersionSignature: Ubuntu 5.6.0-1021.21-oem 5.6.19 Uname: Linux 5.6.0-1021-oem x86_64 ApportVersion: 2.20.11-0ubuntu27.9 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sat Oct 17 17:53:01 2020 InstallationDate: Installed on 2020-08-03 (74 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=ru_RU.UTF-8 SHELL=/bin/bash SourcePackage: linux-oem-5.6 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1900254/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
