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After installing the new Ubuntu version 14.04 LTS, the keyboard and mouse are not working.

I have Ubuntu 10.10 installed and i want to update to the last version (14.04), so i installed the new version in a new hard disk.

During installation the keyboard and mouse worked fine, after reboot the keyboard and mouse didn't work anymore. If i try to unplug any of them and then i reconnect them, sometimes the system halts.

I have a motherboard ECS C51GM-M, and the keyboard and mouse are PS/2.

It's important to mention that in Ubuntu version 10.10, all still works fine.

Finally, i want to clarify that i'm new in Ubuntu, i haven't installed the previous version.

Thanks for the help

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How did you installed Ubuntu? From a USB drive? – TuKsn May 8 '14 at 18:58
Thanks for your reply Simptnon! No, i installed it from a DVD burned with the ISO image downloaded from Ubuntu website. – DCC May 8 '14 at 19:01
Can you test it with a USB-Keyboard? Perhaps this helps…! or… – TuKsn May 8 '14 at 20:41
Yes, i have tested it with USB keyborad and mouse, but nothing. I'll see that links. Thanks! – DCC May 8 '14 at 21:03
You can not hotplug PS/2 devices - that is why it crashes when you try to unplug them – bain May 8 '14 at 22:26

I had this problem after updating. I can't use my keyboard/mouse if I load the latest Linux kernel, (Linux 3.13.0-24-generic) but if I choose an older one (Linux 3.11.0-19) under Advanced options for Ubuntu in GRUB it works for me.

I have a PS/2 keyboard and USB mouse.

Not sure if that helps on your new install though, it might not have shipped with other kernel versions

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I had the same problem, mouse and keyboard working fine in the installer but nothing at all working when the system booted.

I used unetbootin for writing the USB stick from which I installed. After switching to Universal USB installer and reinstalling the system, everything is now working fine.

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