On Sat, Aug 13, 2011 at 8:46 AM, Manolo Martínez <manolo@xxxxxxxxxxxxxxxxx> wrote: > Anyway, as I say, I was hoping that a difference of behaviour between > A/C and battery would be indicative of malfunction in some particular > piece of software... Maybe if you end up looking into your user's system > you'll be kind enough to let me know what you find? > > Thanks again, > Manolo > The piece of software you mean are the acpi drivers (please correct me), written to work on a lucky percentage of hardware. I guess they are part of the kernel package. Heard of this kind of issue first when I started with linux 3 years ago. There might be modified drivers which could work for you. Maybe google will turn something up about Toshiba Satellite U500 and linux. mar77i