I have encountered a problem using my Uno with my PC, which is a Debian Lenny box. Please let me know if any further information will help diagnose it (I am not sure where to start with details) but here goes:
Installed IDE (version 0021, I think) and plugged in my new Uno. Was able to upload sketches without any problems. Did so for several weeks.
A while later (after upgrading to IDE 0022 in the meantime and some Debian automatic updates which included a kernel update, I think, to 2.6.26-2-686), I found that I suddenly could not upload sketches. I also noticed that the IDE Tools menu was very slow to open, and only one port is available to select (/dev/ttyS0), and when I try to upload a sketch I get
Binary sketch size: 3212 bytes (of a 32256 byte maximum) avrdude: stk500_recv(): programmer is not responding avrdude: stk500_recv(): programmer is not responding
If I start the IDE as root, I get two ports to choose from , /dev/ttyS0 and /dev/ttyACM0. Uploading to /dev/ttyACM0 responds with
Binary sketch size: 3212 bytes (of a 32256 byte maximum)
and then just sits there, with no error message
I looks like either the IDE upgrade or the kernel update has introduced a problem (although that may be two red herrings) but I am not a Linux expert so I don't quite know where to turn.
Can any one offer any help? Are there any logs, for example, that may offer more information? The other USB devices appear to be working normally - in fact I am temporarily plugging my Uno onto what is usually the printer USB cable, and the printer works fine off it.