KVM Switch
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KVM Switch
15-10-2008 4:53 PM
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Re: KVM Switch
15-10-2008 7:19 PM
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I recently bought a Chinese made, unbranded KVM that claims support up to 1920 x 1440, for 30 quid, at a computer fair. (That was for a 4 port, PS/2 type.)
I've seen one in on-line shops, that looks like it came from the same factory, with Edimax branding on it, which costs about 50+ quid.
Re: KVM Switch
15-10-2008 7:44 PM
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http://www.edimax.com/en/produce_detail.php?pl1_id=6&pl2_id=30&pl3_id=62&pd_id=251
available here:
http://www.tekheads.co.uk/s/product?product=608397&gclid=CMLW1ebxqZYCFQwvlAodlVl9zg
it's cheap too.
Re: KVM Switch
15-10-2008 11:32 PM
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Re: KVM Switch
16-10-2008 1:27 AM
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The problem is with Logitech mice, which use an extended (and therefore non-standard) communications protocol that is not supported by most KVM manufacturers.
As a rule of thumb, if the KVN speciication does not mention Logitech support, it's best to be cautious and assume that a Logitech mouse is not going to work.
Re: KVM Switch
16-10-2008 1:21 PM
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Re: KVM Switch
17-10-2008 10:42 AM
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Its got switchable USB ports/Audio/PS2.
Was abit picky on normal XP but XP 64bit had no problems with it.
Re: KVM Switch
18-10-2008 6:29 PM
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Quote from: jac2285 I would just like to add that I tried it with a Microsoft set with the same results, from the advice I was given by Edimax it would appear it only works with a very basic setup with no extra keys or functions, Jack.
That's a shame. Some Microsoft kit also have non-standard extensions that a KVM won't recognise. Though these days, most KVM switches do seem to be Intellimouse compatible, at least.
Also your operating system can make a difference. Linux is far more picky about accepting input from a KVM than windows is. I've never found out why, but some versions of Linux distributions just do not like some KVM equipment, and compatibility seems to vary as Linux versions change. If you get a combination that doesn't work, it's just tough luck, there seems to be little you can do except look for alternatives that do work together.
It's all a bit hit-and-miss really. Less so now-a-days, but you still sometimes have to compromise if you want to use a KVM. I have given up buying expensive mice because of these sort of problems. Every time I buy a new KVM, I drag out my favourite Logitech trackball from the cupboard in the hope that it may work with the new switch, but I've had no luck so far.
Re: KVM Switch
18-10-2008 8:11 PM
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Quote from: alanb Any cheapo no-name KVM switch should do it.
The problem I have found with cheap ones is that they will not fool the computers into thinking that there is a keyboard attached if thay are not switched to that computer. Obviously you can set the BIOS to not halt on keyboard errors but sometimes Windows has a problem with it. Linux is fine. That is why with my Linux and Windows servers the switch has to always be set to the Windows server unless I need to switch to the Linux server for a short time. Otherwise windows will not start if I reboot remotely.
Re: KVM Switch
18-10-2008 8:58 PM
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Re: KVM Switch
18-10-2008 9:42 PM
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A proper KVM does emulation of keyboard and mouse so that every PC always see what it believes is a keyboard and mouse, so they should never suffer a problem like the one you've described.
Some of the cheaper KVMs have phantom power supplies - meaning they derive power from a PS/2 or USB port on one of the PCs. This can make them sensitive to the order that PCs are started. Usually this can be solved by connecting the KVM to a little wall-wart type PSU of the correct voltage (if the KVM has a suitable socket, of course.)
Re: KVM Switch
18-10-2008 10:19 PM
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It is not really an issue as I cannot remember the last time I needed to work at either machine locally. If I was using a KVM for 2 desktop machines I would definitely spend a little more money.
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