heavy random mouse lag

[Stefan Tammer]

I discovered heavy mouse lag occurring randomly. To me it seems like a bug caused by the kernel and being related to the kworker process.

I started to use Linux Mint switching from Windows 7 almost tow moths ago. I use the Mint 14 x64 version with Cinnamon Desktop on a Lenovo Thinkpad SL500 2746F2G. After setting everything up I discovered these annoying mouse lags that happened randomly sometimes even after a fresh boot. I tried different kernels, updating of all the Xorg components and many more. The only thing that seemed to fix this to switch to a classic Gnome session. However I liked to keep cinnamon desktop.

Today I tried to solve this workaround:

 sudo -i
    echo N> /sys/module/drm_kms_helper/parameters/poll
    echo "options drm_kms_helper poll=N">/etc/modprobe.d/local.conf

so far it seems to work
- confirmed workaround after a week of testing

[bisher bas (bisherbas)]

Experiencing terrible mouse lag on LM 17.2 Cinnamon. Especially when there is a process running in the background (file copy etc.)

[DJ Mentos (djmentos)]

I have the same issue too. Lags was sometimes on LM 17.1, but after upgrade 17.2 it does happen more often. I am not able to determine what is the reason, but it might be related to Bluetooth driver - I'm using Logitech Z855 BT mouse and cheap LogiLink's Bluetooth receiver for USB (connected to 2.0).

Hardware problems can be rejected - under Windows it works perfectly. When problem occurs with BT mouse, other wireless mouse but with own protocol and receiver (2.4 GHz) works good and that's why I think it's BT problem.

Above workaround didn't worked for me.

$ lsusb
Bus 003 Device 005: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)

$ dpkg -l | grep tooth | awk '{print $2" - "$3}'
bluetooth - 4.101-0ubuntu13.1
bluez - 4.101-0ubuntu13.1

$ uname -a
Linux daniel-pc 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38 UTC 2014 x86_64 x86_64 x86_6