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I'm running Lubuntu at quite an old MacBook (6.1). Trying to keep it up-to-date so for the moment it's 14.04. Several months ago (after one of the updates) a strange problem arose: at a random moment of time touchpad becomes veeeery laggy so there's absolutely no way you can continue working - the only thing to help is a reboot. At the same time there's no extra CPU usage or anything extraordinary I've noticed. Spent long time looking for a clues but all I've found is that the problem appears only when Google Chrome is open.

Turned off Chrome extension I've used - still there.
Found somewhere that reinstalling ibus could fix the problem, but it didn't.
Tried to use Chromium instead of Chrome - no help (strange if it were though).
While switched Chrome to Chromium noticed that until PepperFlash installation (since there's no flash support in the latest version) Chromium didn't raise the problem, but I've use it without plugin for quite a short time so it might just be my luck (unluck?)...

So could you please guide me in this challenge? I would appreciate any ideas on where to start looking...

FlasH from Ru
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Well, it's been 2 months after I've applied the fix and the problem hasn't reappeared since then - assuming the fix is permanent: just added irqpoll to the end of my kernel boot command at grub.conf like the kern.log said (also found at https://forums.gentoo.org/viewtopic-t-780725-start-0.html)

Editor's Note
Check this question for setting boot parameter: How do I add a kernel boot parameter?

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FlasH from Ru
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