From: Cameron M. <cm...@uc...> - 2005-07-15 20:15:32
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hi, i apologize for the somewhat off-topic post to both lists, but I figured there may be many O and PyMOL users who use stereo with a monitor connected through a KVM switch? if so, please see the 2nd question in my email below... thanks, cameron === Cameron Mura wrote (on 07/15/2005 10:28 AM): === > hi, > > I'm wondering if anyone would recommend any particular brands & models > of KVM switches for toggling between a couple of different Linux boxes? > a couple of things to note about this particular set-up are: > > 1) a 2048x1536 CRT monitor is being used, so it would be nice if the > kvm supported higher video resolutions than the usual 1600x1200 or > 1920x1440... > > 2) the nvidia card in the FC4 box supports quad-buffered > stereo-in-a-window (and it works fine w/out the kvm switch), so it > would be nice if the kvm didn't interfere w/ that? (is this possible? > seems like it should be if the kvm switch supports an adequate refresh > rate and all that?) > > 3) would be nice if the KVM, linux boxes, and USB mouse were all > interoperable. Reason i point this out is that the logitech USB mouse > i had been using w/ the FC4 box freaked-out (at least on the FC4 box) > after being plugged-in (via USB<-->PS/2 adapter) to the PS/2 connector > of a Belkin KVM switch (the popular OmniView SOHO F1DS104T model)... > > so... any advice about what might be the most > USB-/stereo-/linux-friendly KVM switch would be grealy appreciated! > > thanks, > cameron > > |
From: D. J. A. <de...@ia...> - 2005-07-27 16:15:16
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On Fri, Jul 15, 2005 at 01:15:13PM -0700, Cameron Mura wrote: > there may be many O and PyMOL users who use stereo with a monitor > connected through a KVM switch? > >3) would be nice if the KVM, linux boxes, and USB mouse were all > >interoperable. Reason i point this out is that the logitech USB mouse > >i had been using w/ the FC4 box freaked-out (at least on the FC4 box) > >after being plugged-in (via USB<-->PS/2 adapter) to the PS/2 connector > >of a Belkin KVM switch (the popular OmniView SOHO F1DS104T model)... I've found that when switching amongst Linux boxes with a two-port Belkin OmniView PS/2-VGA KVM that I have to switch out of X Windows and into a virtual terminal and then back to X Windows before the pointer and mouse will work well again together. So, in terms of specific keystrokes, that is for example Ctrl-Alt-F1 to switch from X to virtual terminal 1, and then Alt-F7 to switch back to X (though of course X is at Alt-F5 on various live CDs like KNOPPIX). I'm in the process now of deploying KVMs more widely for general use, using a mix of connectors, including USB-VGA KVMs with Dell-Dell combinations and Dell-Mac combinations with and without USB-to-PS/2 and PS/2-to-USB adapters , and in one case, using a (rather pricey, but seems to work OK) DVI-USB KVM to switch between a G4 and a G5 PowerMac. I have not run any quad-buffered stereo through any of the KVMs, yet, but hope to get the chance to do that (even if just in full screen mode, or in Linux if/when the drivers catch up) on the G5 PowerMacs we're deploying now. I'd also appreciate reading about experience with this that anyone has had. -- D. Joe Anderson, Asst. Sci. 2252 Molecular Biology Bldg Biochem, Biophys, & Mol Bio Iowa State Univ, Ames, IA 50010 How to help someone use a computer http://polaris.gseis.ucla.edu/pagre/how-to-help.html |
From: Leonard T. <tho...@it...> - 2005-07-27 17:00:15
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I have been using a Tripp-Lite 2 port KVM switch now for about 3 years with a whole different combination of platforms and have yet to run into a problem. Len On Wed, 2005-07-27 at 08:48, D. Joe Anderson wrote: > On Fri, Jul 15, 2005 at 01:15:13PM -0700, Cameron Mura wrote: > > > there may be many O and PyMOL users who use stereo with a monitor > > connected through a KVM switch? > > > >3) would be nice if the KVM, linux boxes, and USB mouse were all > > >interoperable. Reason i point this out is that the logitech USB mouse > > >i had been using w/ the FC4 box freaked-out (at least on the FC4 box) > > >after being plugged-in (via USB<-->PS/2 adapter) to the PS/2 connector > > >of a Belkin KVM switch (the popular OmniView SOHO F1DS104T model)... > > I've found that when switching amongst Linux boxes with a > two-port Belkin OmniView PS/2-VGA KVM that I have to switch out > of X Windows and into a virtual terminal and then back to X > Windows before the pointer and mouse will work well again > together. So, in terms of specific keystrokes, that is for > example Ctrl-Alt-F1 to switch from X to virtual terminal 1, and > then Alt-F7 to switch back to X (though of course X is at Alt-F5 > on various live CDs like KNOPPIX). > > I'm in the process now of deploying KVMs more widely for general > use, using a mix of connectors, including USB-VGA KVMs with > Dell-Dell combinations and Dell-Mac combinations with and > without USB-to-PS/2 and PS/2-to-USB adapters , and in one case, > using a (rather pricey, but seems to work OK) DVI-USB KVM to > switch between a G4 and a G5 PowerMac. > > I have not run any quad-buffered stereo through any of the KVMs, > yet, but hope to get the chance to do that (even if just in full > screen mode, or in Linux if/when the drivers catch up) on the G5 > PowerMacs we're deploying now. I'd also appreciate reading > about experience with this that anyone has had. -- Leonard M. Thomas Ph.D. Howard Hughes Medical Institute X-ray Laboratory Manager California Institute of Technology tho...@ca... Division of Biology, 114-96 626-395-2453 Pasadena, CA 91125 http://www.br.caltech.edu/cmclab |
From: Cameron M. <cm...@uc...> - 2005-08-22 18:38:03
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Hi Joe and other KVM users, Not to revive too old of a thread (see emails below), but I thought you or some others might like to know what final KVM solution I settled upon for a mixture of windows and linux boxes. I initially tried the common Belkin OmniView SOHO 4-port KVM switch (PS/2 connectors) and found it to work OK, except that most of the time the USB mouse (connected via USB/PS2 adapter) was completely unresponsive when switched to one of the linux boxes (I think it was the FC4 box). So, based on its affordability, tech specs, and others people's recommendations, I then tried IOGEAR's USB-capable MiniView III (model # GCS1714). It worked very well for toggling between a couple of Linux boxes (running FC4 and RHEL WS 4) connected to a high-res 22" CRT (2048x1536 @ 79 Hz refresh) and a USB keyboard and mouse -- at least in terms of little to no delay for mouse and keyboard responsiveness, playing well w/ the linux OS, etc... However, there was a serious problem with shadowing/ghosting of the graphics (at least at higher resolutions... 2048x1536 and 1920x1440). After enduring a session w/ the IOGEAR tech rep., it was pretty much decided that this KVM switch simply "couldn't handle this size monitor at these resolutions...". So, given that my earlier Belkin experience was OK in terms of graphics quality, I then tried a cheaper solution (<$70 from Fry's) -- Belkin's "2-port KVM switch with audio support and built-in cabling" (Belkin model # F1DL102U) -- and found that this worked perfectly... the USB mouse and keyboard both work fine on both Linux boxes, there are no aberrations of the graphics display (I didn't even have to resort to Belkin's "Gold Series" VGA cables for suitable image quality!), and only minimal lag (1-2 seconds) when toggling between machines... The main lesson I learned from all this is (1) to avoid using USB-to-PS2 adapters for keyboard and mice connected to KVM switches operating with linux and (2) don't use the IOGEAR MiniView III switch for high res displays. Cam === D. Joe Anderson wrote (on 07/27/2005 08:48 AM): === >On Fri, Jul 15, 2005 at 01:15:13PM -0700, Cameron Mura wrote: > > > >>there may be many O and PyMOL users who use stereo with a monitor >>connected through a KVM switch? >> >> > > > >>>3) would be nice if the KVM, linux boxes, and USB mouse were all >>>interoperable. Reason i point this out is that the logitech USB mouse >>>i had been using w/ the FC4 box freaked-out (at least on the FC4 box) >>>after being plugged-in (via USB<-->PS/2 adapter) to the PS/2 connector >>>of a Belkin KVM switch (the popular OmniView SOHO F1DS104T model)... >>> >>> > >I've found that when switching amongst Linux boxes with a >two-port Belkin OmniView PS/2-VGA KVM that I have to switch out >of X Windows and into a virtual terminal and then back to X >Windows before the pointer and mouse will work well again >together. So, in terms of specific keystrokes, that is for >example Ctrl-Alt-F1 to switch from X to virtual terminal 1, and >then Alt-F7 to switch back to X (though of course X is at Alt-F5 >on various live CDs like KNOPPIX). > >I'm in the process now of deploying KVMs more widely for general >use, using a mix of connectors, including USB-VGA KVMs with >Dell-Dell combinations and Dell-Mac combinations with and >without USB-to-PS/2 and PS/2-to-USB adapters , and in one case, >using a (rather pricey, but seems to work OK) DVI-USB KVM to >switch between a G4 and a G5 PowerMac. > >I have not run any quad-buffered stereo through any of the KVMs, >yet, but hope to get the chance to do that (even if just in full >screen mode, or in Linux if/when the drivers catch up) on the G5 >PowerMacs we're deploying now. I'd also appreciate reading >about experience with this that anyone has had. > > > -- Cameron Mura UCSD |