Comment 56 for bug 974455

Robert, I don't know how much of this is software and how much of it is hardware (or maybe a combination of both) but consider this:

I got the U300S in approx November of 2011, by February of 2012 the hard drives had died and had to be replaced. In approx September of 2012, the t-key issue had spread to the function keys, to the touchpad and eventually no BIOS flashing or anything could help. I took the laptop in for repair in October, a couple of weeks after reporting some success on this bug discussion.

Lenovo replaced the entire keyboard and touchpad, plus said they also replaced the internal battery charger and the USB3, even though neither of these had caused me any problem. I was happy man until a few weeks ago. Then this: first, I noticed the loudspeakers weren't working, but since I don't use them I couldn't be sure how long it had been, the sound was fine with a headset, for about a week, when that also went south. Then I lost the touchpad again, for a few hours, and then the delete key is now completely gone. In the meantime the USB3 (which had been working 100% until Lenovo replaced it, reporting problems in their tests) started to work only about 50% of the time (2 insertions for 1 detection). I'm taking it to repair for the third time tomorrow.

So bottomline: there's a very serious issue inside, probably cables improperly connected and shorting and damaging the hardware. For some reason there's an interaction with Ubuntu and/or the sleep mode / battery charge. But the bottomline is: it's rotten inside. So if you have a warranty, get it all fixed by Lenovo and think twice next time you buy a new laptop.