[bmastenbrook]

Which distribution of Linux? Do you use compositing? If so, what compositing window manager are you using? What's your typical uptime? Do you use multi-monitor? Have you used an 802.11n AP, particularly a 5GHz AP supporting WLAN power save (such as an AirPort Extreme)?

Under a different set of circumstances, Natty could have been said to be flawless on my T420, and indeed I thought it was for the first few days. When I started using the system more intensively for the tasks I bought it for, I began to notice the problems.

[jessedhillon]

  - Distro: Ubuntu, then Fedora
  - Compositing: Yes
  - WM: Mutter
  - Uptime: weeks, currently 15 days
  - Multi-monitor: haven't yet, I could try and let you know what happens
  - 802.11n: No

I noticed on the notes for your laptop that you have an Nvidia graphics card. I had an Nvidia on my last laptop and that experience convinced me never to get a card that requires a proprietary driver. I always had issues with compositing, resuming from sleep, and artifacts appearing on my desktop (especially text corruption in terminals).

[sherr]

I'm also using an X220 and Linux, without problems. Debian Sid. Everything seems to work, no lockups (not using compositing though). Nice laptop.