FS#70728 - Thinkpad T495 Elantech touchpad generates excessive IRQ requests
Attached to Project:
Arch Linux
Opened by Ennis Massey (microtx) - Thursday, 06 May 2021, 01:09 GMT
Last edited by Toolybird (Toolybird) - Sunday, 04 June 2023, 03:52 GMT
Opened by Ennis Massey (microtx) - Thursday, 06 May 2021, 01:09 GMT
Last edited by Toolybird (Toolybird) - Sunday, 04 June 2023, 03:52 GMT
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Details
Description:
The touchpad on the Thinkpad T495 generates an excessive number of IRQ's when in use. I did some quick measurements and it seems to come in at around 470 interrupts per second when the trackpad is being used. I've sent an email to Elantech (who makes the touchpad) to see if they can provide help. I've tried to look for a solution, but haven't found much outside of other people running into the same issue. Additional info: * Kernel Version: 5.11.16-arch1-1 * Laptop Model: Thinkpad T495 Steps to reproduce: - Using a T495 laptop, watch `lsirq` - Move the mouse around using the touchpad - The IRQ for the i8042 chip should rapidly increase. Also attached relevant lines from dmesg. |
This task depends upon
Closed by Toolybird (Toolybird)
Sunday, 04 June 2023, 03:52 GMT
Reason for closing: Upstream
Additional comments about closing: Clearly an upstream issue. If still happening, please report upstream to the kernel folks.
Sunday, 04 June 2023, 03:52 GMT
Reason for closing: Upstream
Additional comments about closing: Clearly an upstream issue. If still happening, please report upstream to the kernel folks.
Some other similar reports (although not identical):
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/194489
- https://askubuntu.com/questions/1247208/touchpad-causes-huge-amount-of-interrupts-and-high-power-usage