Another Bionic back port here: https://people.canonical.com/~khfeng/lp1728244/bionic/
Make sure the system gets coldboot (shutdown) before testing. If this doesn't work, please file a new bug. Quite possibly the touchpad is different. ** Description changed: - On the Jumper EZBook 3 Pro (V4) laptop, using an Apollo Lake N3450 - processor, if you install Ubuntu 17.10 (or less) with isorespin and use - rEFInd as bootloader (this is the only way to get linux booting on this - laptop) everything works out of the box, but after a reboot or two the - touchpad stops working. Both in Ubuntu and Windows 10. The only way to - restore functionality is to boot from usb key ubuntu 17.10 respined, or - disassemble laptop and detach-reattach battery cable. This is mesg | - grep i2c_hid: + ===SRU Justification=== + Hantick touchpad stops working after reboot. + [Fix] + Disable runtime power management for the touchpad. + + [Test] + User confirmed it fixed the issue. + Some users reported it doesn't work for them, I'll ask them to file new + bugs for different touchpads. + + [Regression Potential] + Low. Disable runtime power management doesn't affect devivce's + funtionality. In general desktop usage the graphical session opens the + touchpad HID device so the touchpad never get runtime suspended, so it + won't hurt power in this case. + + ===Original Bug Report=== + On the Jumper EZBook 3 Pro (V4) laptop, using an Apollo Lake N3450 processor, if you install Ubuntu 17.10 (or less) with isorespin and use rEFInd as bootloader (this is the only way to get linux booting on this laptop) everything works out of the box, but after a reboot or two the touchpad stops working. Both in Ubuntu and Windows 10. The only way to restore functionality is to boot from usb key ubuntu 17.10 respined, or disassemble laptop and detach-reattach battery cable. This is mesg | grep i2c_hid: [ 2056.460636] i2c_hid i2c-SYNA3602:00: i2c_hid_get_input: incomplete report (27/34) [ 3077.604699] i2c_hid i2c-SYNA3602:00: failed to reset device. [ 3077.605473] dpm_run_callback(): i2c_hid_resume+0x0/0xe0 [i2c_hid] returns -61 [ 3080.468156] i2c_hid i2c-SYNA3602:00: i2c_hid_get_input: incomplete report (27/34) - uname -rvps Linux 4.10.0-32-generic #36~16.04.1-Ubuntu SMP Wed Aug 9 09:19:02 UTC 2017 x86_64 There has to be a bug in the kernel. Any way to avoid this? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1728244 Title: Touchpad stops working after reboot on Apollo Lake To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1728244/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
