Date: Thu, 21 Jun 2007 12:52:00 -0600 From: Modulok <modulok@gmail.com> To: "Manolis Kiagias" <sonicy@otenet.gr> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: Pressing CTRL-ALT-SPACE on usb keyboard freezes FreeBSD Message-ID: <64c038660706211152j67689003y53fe9268617f7e2@mail.gmail.com> In-Reply-To: <467A6ED4.8050202@otenet.gr> References: <467A6ED4.8050202@otenet.gr>
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On 6/21/07, Manolis Kiagias <sonicy@otenet.gr> wrote: > Hi all, > > This is a very weird symptom, noticed today for the first time. I have a > cheap Microsoft wireless keybaord with USB connection, on one FreeBSD > 6.2 release machine that acts as a lightweight server / occasional > desktop. While in the console (no X running) I accidentally pressed > CTRL-ALT-SPACE, received a message about USB controller error (sadly > cannot remember exactly) and the machine froze completely. Tried from > another machine but to no avail, it was completely frozen. After restart > I tried it a second time, again same results. > Changed some bios settings (disabled legacy USB support, that was > actually the only option for USB besides disabling it completely) and > checked a third time, still the same. > Now I know this has something to do with the USB but the motherboard is > not faulty. I don't know if it has to do with the particular keyboard (A > Microsoft conspiracy to bring the CTRL-ALT-DEL equivalent to FreeBSD ? > :) ) but was wondering if anyone else has had a similar problem (or is > brave enough to try...). I should also note that after pressing > CTRL-ALT-SPACE the green power led of the machine started blinking (like > sometimes motherboards do when entering standby or something, only there > is no option for this in BIOS). Motherboard is a cheap but brand new > ASROCK 478-based P4 motherboard. > > > Thanks > Manolis It's a BIOS feature known by man names including: Sleep state S3, Standby or Suspend to RAM. It is not a flaw, (arguably), and it's not specific to any particular kind of keyboard interface. You should be able to disable it in your BIOS's setup program. For example under my BIOS I would go: APCI >> ACPI Suspend Type >> (set from 's1&s3' to 's1') Now when I press ctrl+alt+space I get the following message: "acpi0: Sleep state S3 is not supported by BIOS." There are probably other was of disabling it as well. -Modulok-
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