On Sun, 2010-07-18 at 14:37 +0200, Jörn Nettingsmeier wrote: > On 07/17/2010 10:46 PM, f...@kokkinizita.net wrote: > > > What I don't understand is how the contacts got so dirty. > > If a resistance of a few kOhm is enough to make it look > > as a closed contact then it can't be handling large currents, > > so there should not be any arcing. And the construction of > > the thing is such that it is virtually closed, no dust or > > whatever could ever creep in. > > it can't be totally sealed, as that would require an expensive gasket. > my guess is that the way servers are designed, air is drawn in through > the front (the "cold aisle" in datacenter lore), and expelled through > the rear (the "hot aisle"). after some years of use, it's not so > unlikely for gunk to accumulate pretty much anywhere in the path of the > airflow. > and the conductivity of pure industry-strength gunk should never be > underestimated. > > btw, if the bios does not allow the boards to be configured as "always > on after power loss" (common on older hardware), a capacitor in place of > the momentary power switch works nicely, provided its charging current > has dropped to zero before the bios thinks it's a > more-than-four-seconds-turn-me-off event.
Just for fun I used the German Google to search for the switch issue. It seems to be something that happens very often :D. Wow, my PC case is that old, that I had to manipulate the LED jacks, because they don't fit to modern mobos, but the switches never were broken. What's a good value for a capacitor? Btw. I pushed the momentary switch while running a GNOME session on Suse 11.2. As expected the ShutDown-Restart-Suspend-Hibernate menu appeared. I closed the menu and pushed the momentary switch again, but the the computer turned off, without doing a shutdown. _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev