Hi Rob, Glad to hear it's sorted. Would definitely be grateful for the link as an interim option.
Cheers. On Mon, May 23, 2022, at 7:51 AM, rmlugli...@gmail.com wrote: > Hi Dom > > I'll dig the link out but, fwiw, I finally sorted this out - and it's > not a KVM issue. It's actually to do with USB and particularly the > way in which USB is "serviced" by Windows. As I said in the OP, I'd > not come across these errors on Linux or Mac. > > Suffice to say, if you're having the same problems I was (occasional > mouse and or keyboard freeze, then keyboard repeating for no reason), > the answer is delightfully low tech: change the USB port until you find > one that works. My new work laptop (HP Elitebook) exhibited the same > problems as my own Windows machines. My KVM was connected to the work > laptop via a spare USB A port and was showing the errors above. I > moved the KVM to a USB C port on the laptop (via a tiny A to C adaptor) > and it's been solid every since - over 3 weeks now. > > I did some reading into this - though I've lost the link now. It > turns out Windows does not treat all USB ports equally (and it's not to > do with USB 2 or 3 etc). A lot (apparently) depends on the order in > which the ports are serviced by Windows. It _seems_ (YMMV) that USB C > (being far more popular nowadays) is handled before USB A ports. > This, of course, didn't explain the issue on my home PC (which doesn't > have USB C) but changing the USB port on that has fixed that too. > > As I say, YMMV, but changing the port does seem to be the workaround. > > Thanks > Rob > > -----Original Message----- > From: Hampshire <hampshire-boun...@mailman.lug.org.uk> On Behalf Of Dom > Rodriguez/shymega via Hampshire > Sent: 22 May 2022 16:52 > To: 'Peter Alefounder' <hampshire@mailman.lug.org.uk> > Cc: Dom Rodriguez/shymega <shym...@shymega.org.uk> > Subject: Re: [Hampshire] [OT] More IT than Linux: Bizarre KVM issue. > > Hi, > > I have a cheap DP KVM switch, which is a bit unreliable. I don't have > any DVI devices anymore! 😃 > > I do work on Input Leap, a fork of Barrier KVM switch software (itself > a fork of Synergy 1.x), but I've moved my focus to my own hybrid h/w / > s/w KVM switch, called Continuity. The only problem so far is that the > idea was for video streaming, and for work laptops, it needs a driver. > I haven't written the USB or video streaming drivers yet. No experience > with Windows or macOS kernels... > > Can you link to the 8-port KVM switch? I'm running out of ports on my > 4-port KVM switch, and with the work laptop now, I need an extra port! > > Onto your issue, the only thing I tend to experience is USB bus > malfunctions. Generally, it recovers after I turn off the USB hub and > on again after switching... > > Thanks. > > On Thu, May 5, 2022, at 11:40 AM, rmluglist2--- via Hampshire wrote: >> Hi all >> >> Has anyone had an issue with a KVM where there’s a distinct lag and >> then key repeat problem on some of the boxes and not others? >> >> I have a 4 port (Belkin USB / DVI) KVM switch. Two machines are >> Windows 10 (on which this problem is intermittent) and the other 2 >> machines are a Mac and a Linux (Fedora) box. On the non-Windows >> machines, the issue doesn’t exist. >> >> I’ve tried connecting the kbd straight into the windows machines and >> that fixes the problem. Then when I revert to connecting via the kvm, >> the problem is intermittent i.e. happens about 5%-10% of the time. As >> such, while this would point toward a faulty KVM, why is this only >> occurring on Windows machines? I’ve checked Device manager and the >> same device is detected whether via the kvm or directly connected. >> >> As I say, I’m loathe to change the kvm because a) they’re expensive >> and I’d actually have to replace the 4 port with an 8-port which is £180: >> very pricy for me. And b) Linux and Mac have no problems. I could >> replace the 4 port with another 4 port but I have been looking to >> expand connections for ages. >> >> And c) I realise I could drop Windows altogether but one’s provided by >> my employer – so that has to be Windows >> >> Any thoughts anyone? >> >> Cheers >> rob >> -- >> Please post to: Hampshire@mailman.lug.org.uk Web Interface: >> https://mailman.lug.org.uk/mailman/listinfo/hampshire >> LUG URL: http://www.hantslug.org.uk >> -------------------------------------------------------------- > > -- > Kind regards, > -- > Dom Rodriguez (also known as shymega) > > > -- > This email has been checked for viruses by AVG. > https://www.avg.com > > > -- > Please post to: Hampshire@mailman.lug.org.uk > Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire > LUG URL: http://www.hantslug.org.uk > -------------------------------------------------------------- -- Kind regards, -- Dom Rodriguez (also known as shymega) -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --------------------------------------------------------------
