Lenovo W520 with Ubuntu Gnome. The performance is great, and I haven't had any major compatibility problems. The touchpad is excellent and works great out of th

Lenovo W520 with Ubuntu Gnome. The performance is great, and I haven't had any major compatibility problems. The touchpad is excellent and works great out of the box. Build quality is superb. Some issues though: * battery only lasts around 90 minutes on full settings, and half of that if you're compiling something heavy. This is a used laptop though, so no idea how many battery cycles it had when I got it. * switching to an external monitor is annoying. Out of the box it doesn't remember the display layout settings (mirror/extend/etc). If I switch off the on-board GPU and use the discrete one, the VGA port is unavailable. Sending sound over HDMI doesn't always work. * wifi sometimes gets into a weird state where it can't find any networks. Resetting the driver helps though. * the only available AC adapter weighs a couple of pounds and is huge. Haven't had any luck finding a more reasonably-sized aftermarket one. * the speakers are too weak even on 100% volume.