"T.C. Hollingsworth" <tchollingsworth@xxxxxxxxx> writes: > On Sat, May 24, 2014 at 9:18 AM, lee <lee@xxxxxxxxxxxxxxx> wrote: >> what would be the device for a Kensington Slimblade which is connected >> to a PS/2 port with an USB-->PS/2 adapter? The device doesn`t seem to >> appear anywhere when connected like that. > > It should appear like any other PS/2 mouse. If it does not appear, > your mouse does not support the PS/2 protocol. > > Most USB-to-PS/2 adapters are passive converters, and require the > device itself to speak the PS/2 protocol. Many keyboards and mice > were (and some still are) designed to speak both the PS/2 and USB HID > protocols so they can be used with such passive converters. Most new > ones (e.g. this decade) only speak USB. > > If you really must use the PS/2 port, they do make _active_ adapters > that work with any sort of device. Oh, ok, that`s probably the problem I have! I need a different adapter ... I knew there are "active" adapters but I didn`t find out what that actually means and thought it might have to do with supplying power to the device. I don`t /have/ to use PS/2, but I /want/ to use PS/2. USB devices must be polled, which makes them slow. Using USB for this has only disadvantages, with the only exception that the devices can be hotplugged. >> And what are virtual keyboards for, and why do I supposedly have two >> power buttons? > > The XTEST devices allow for the X server to be tested/used without > real hardware: > http://www.x.org/releases/X11R7.7/doc/libXtst/xtestlib.html > (While the interface may have been built for testing purposes, I > wouldn't be surprised if it is used for other reasons these days, like > virtual desktop software.) Some software like vnc seems to require it ... I`ll have to see what happens what I disable all the testing extensions; there doesn`t seem to be an easy way to disable only XTEST. > Power buttons are implemented as "keyboards" because X has no better > way to let your desktop environment know you've pressed it, seeing as > how it dates back to the days where most computers had actual switches > that really cut power immediately. > > As for why you have two, some motherboards have two plugs for them, or > a special little internal power buttons on the motherboards > themselves, or are just poorly engineered and say they have two when > they really have one. :-) Ah, yes, my board has a power button on it. I never use that and forgot about it ... Thank you for all your explanations, that was really helpful! :) -- Fedora release 20 (Heisenbug) -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
