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there is a guide somewhere on the alphagrip google group about setting the trackball speed differently to your mouse speed. it'll tell you how to do the udev rules. http://groups.google.com/group/alphagrip?lnk=lr can't link the relevant thread since it's blocked at work :( On 10/12/06, Grant Sewell <dcglug@xxxxxxxxxxxx> wrote: > Neil Stone wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > Grant Sewell wrote: > >> Rob Beard wrote: > >>> HI folks, > >>> > >>> When I was playing around with Kubuntu at work on one of our new Dell > >>> PCs (Pentium D 820) I got wondering something. Would it be possible to > >>> run two desktops at the same time on one PC? > >>> > >>> Now I know there have been products in the past that provide an extra > >>> video output, keyboard, mouse and sound for Windows, but I wondered if > >>> it could be done cheaply on Linux? > >>> > >>> What I was thinking of was... > >>> > >>> Standard PC (say a average sort of spec Pentium D or Athlon 64) with an > >>> ample amount of memory (say 1GB). > >>> An extra video card (say PCI 128MB Radeon card or similar). > >>> An extra sound card (PCI cheapo sound card) > >>> A USB keyboard and mouse and extra monitor. > >>> > >>> I wondered if it would be possible to run two copies of X and Gnome/KDE > >>> etc on the one PC so one user is on the main monitor using the main > >>> keyboard/mouse/sound card and a second user is on a second monitor with > >>> a completely different desktop using the second video card, USB keyboard > >>> and mouse and extra sound card? > >>> > >>> I'm thinking something a bit like LTSP but one one machine? > >>> > >>> Is it possible to have more than one USB keyboard and mouse on a PC and > >>> then specify which one is used for input? > >>> > >>> If it is possible then I dare say it is another opportunity to put some > >>> of these high powered desktop PCs to a more cost effective use. > >>> > >>> Rob > >> I have regularly thought about this, but never actually got around to > >> testing it out. > >> > >> You can certainly add the appropriate entries in your X config, you'd > >> need 2 of everything mind... two mouse entries, two keyboard entries, > >> two GFX card entries, two monitor entries, two "Screen" entries and two > >> ServerLayout entries. > >> > >> You can definitely start a second X session easy enough... from the CLI. > >> I regularly do. At a CLI, if you type "startx -- :1" (without the "" > >> marks) then it'll load up another X session locally. If you wanted to > >> start it on the second set of devices, then you could use "startx -- > >> -layout OtherDevices :1" *should* work (if I've read the docs correctly). > >> > >> Making it do all this automagically on a "normal" distro is, however, > >> going to be a touch more complex. Presuming, of course, that you want a > >> login manager such as GDM to start on both screens. > >> > >> Grant. > >> > > > > Yes thats about it in a nutshell.. I have used somthing like this > > before... wasn't with USB which i can see as the only potential hurdle, > > but still, doable. > > > > - -- > > Neil Stone > > > > Systems Administrator > > FlashTek UK > > USB shoudln't be a hurdle. So long as you know the order in which > devices will be detected, you should be fine. For example, if I want X > to take input from my trackpad (laptop) then I can tell it to read from: > /dev/psaux > /dev/input/mice > /dev/input/mouse1 > > If X is set to /dev/input/mice, then any other pointing device (USB > mouse) will also be read for the same input. However, if I specifically > specify a unique device (/dev/input/mouse1) then any other pointing > device (/dev/input/mouse2, for example) will be ignore by the X session > using /dev/input/mouse1. > > So, it is possible to specify which pointing device each X session uses. > The same is true for keyboards. The hard bit in this respect would be > discovering which physical device is attached to which /dev/ device, and > being confident that they will always use those device names. > > If you wanted to get really into it, you could hack around with the uDev > rules to make it that each known keyboard is assigned unique names (such > as /dev/mainkeyboard and /dev/extrakeyboard) and then use those unique > names in your X config... but that might not be necessary. ;) > > Grant. > > -- > The Mailing List for the Devon & Cornwall LUG > http://mailman.dclug.org.uk/listinfo/list > FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html > -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html