I just discovered (using Thinkpad L520 with 12.04 LTS, Kernel 3.2.0-53-generic), that there must be something wrong with the CPU frequency scaling.
Found this in the Arch-Linux Wiki: 'If you use CPU frequency scaling, avoid using the "ondemand" governor and use the "performance" governor when possible, as the touchpad may lose sync when the CPU frequency changes." https://wiki.archlinux.org/index.php/Touchpad_Synaptics#Touchpad_synchronization_issues If I set the governor to "performance" instead of "ondemand" the sync- faults totaly gone. If you run Unity you can try the indicator-cpufreq (sudo apt-get install indicator-cpufreq) Choose "performance" and test it. No stucks and sync-faults. After going back to "ondemand" the stucks are back. The gonvernor was always set to "performance" after boot/login, but was switched to "ondemand" after a minute or so (to speed up login speed as much as possible) As a workaround until (hopefully) a fix is comming: So, if you want to set the govenor fix to "performance" you have to edit the file: etc/init.d/ondemand (line 27) and change echo -n ondemand > $CPUFREQ to echo -n performance > $CPUFREQ' or simply paste: sudo sed -i s/'echo -n ondemand > $CPUFREQ'/'echo -n performance > $CPUFREQ'/g /etc/init.d/ondemand and reboot. To switch it back to default "ondemand" paste: sudo sed -i s/'echo -n performance > $CPUFREQ'/'echo -n ondemand > $CPUFREQ'/g /etc/init.d/ondemand Gero -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1165089 Title: [Lenovo 3000 N100 Notebook 0768] Synaptic Touchpad constantly losing sync To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1165089/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
