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I am using an Alienware m17x R4 and I have been having little mouse lags system wide. I have tried different mice but to no avail. I also have 12. 04 on an older much slower machine and don't have the lag problem on it. I don't use swap as I have 32 GB of RAM and don't need it. The system does have two gpu, Intel HD4000 and a 680M. I use bumblebee to enable optimus so that I will have better battery life.

The machine also runs all of the UI off of the Intel chip and only runs the 680m when I enter optirun before the application. I am not aware of any bugs in the Intel driver that may be causing it. Any on this problem would be greatly appreciated as it is rather annoying.

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What mouse are you using when experience this lag? and how is it connected? Bluetooth, PS/2, USB, wireless with receiver, etc. Does your touchpad behave the same? And did you share the same mouse device when comparing with your pc? – gertvdijk Sep 13 '12 at 7:31
I am using an Anywhere MX connected via the USB Receiver. I have the same lag on the touchpad as well. I have tried the mouse on the other machine and did not have the lag problem on that machine. I do have it connected to the ESata port as that is the only port that the mouse will function on after login otherwise I have to unplug the adapter for a few second then plug it back in to be able to use the mouse. – user58927 Sep 13 '12 at 7:48
Look in your BIOS if there's a 'USB Legacy support' or a setting of some kind regarding USB input devices and try to change that. From what you're telling me about having to re-plugin the USB dongle makes me think that the kernel has difficulties trying to get direct access to your input devices. – gertvdijk Sep 13 '12 at 8:05
Unfortunately I could not find a USB Legacy support option. If it makes a difference the USB dongle is in the only USB 2.0 port. – user58927 Sep 14 '12 at 6:07

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