Hi,

I am using the windows client daily. I have never seen dropped keystrokes, but sometimes (very rarely) I have the _impression_ that key order is wrong, e.g. I write "test" and get "tset". However, I am not sure if this is the result of bad typing or if it is really happening.

You can try and verify with xev inside the session, if you can find a way to trigger keystroke dropping. You can also check if things change when using another X server on the windows machine, e.g. Mobaxterm or X410 or xming.

Otherwise I have no idea what might be the problem.

Uli

On Wed, Jul 17, 2024 at 4:46 PM Uranus Hertz <uranushertz@gmail.com> wrote:

Yes, I have. And even other servers/hosts.

The common part is the x2go client on Windows. That is the part/host that is introducing the missing keystrokes. If I connect to the same x2go servers from say my Linux workstation, on the same LAN, I do not see the keystroke dropping.

Something about the windows client, or my Windows installation specifically (I do not have another Windows system I can try in this instance), is causing the issue.

So, anyone else using the Windows client (4.1.2.0) seeing keystrokes dropping?

Timm

• "Being nice to people, building those relationships early on in your career actually helps in making people want to work with you and believing in your vision." - Girish Mathrubootham, CEO/Founder of Freshdesk

On Wed, Jul 17, 2024 at 6:13 AM Ulrich Sibiller <ulrich.sibiller@gmail.com> wrote:

...

Interesting. Have you tried different desktop environments? Some have their own hotkey handling which might cause problems. E.g. old kde versions sometimes drop keyrelease evens.

Uranus Hertz <uranushertz@gmail.com> schrieb am Mi., 17. Juli 2024, 15:04:

...

Setup - Linux server, Windows 10 client, LAN or 40G remote connection

I have tried many different options in the connection setup with regards Connection options to no avail.

I find that some keystrokes seem to have a higher incidence of being dropped or ignored while using the x2go connection. 'c', spaces, and a few others seem to fail to propagate thru the connection. It is not a mechanical keyboard issue, as I have tried several different keyboards and they all act the same. Connection does not seem to matter as some of the time I am using the client on a local LAN and others via a remote VPN connection.

Anyone else ever seen this behavior?

Cheers,

Timm Gleason

• "Don't be a jerk. Even if you're brilliant, don't be a brilliant jerk." - Girish Mathrubootham, CEO/Founder of Freshdesk

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I have none of that equipment in place in either situation. At home, over the VPN, everything is Ubiquti. At the office, over LAN everything is Cisco.

• *"If the result of your work consumes someone’s cognitive resources, they can’t use those resources for other things that truly, deeply matter. This is NOT about consuming their time and attention while they're using your app. This is about draining their ability for logical thinking, problem-solving, and willpower after the clicking/swiping/gesturing is done." - Kathy Sierra*

On Wed, Jul 17, 2024 at 1:06 PM Michael Ashley <m.ashley@unsw.edu.au> wrote:

I have seen massive problems with missing and re-ordered keystrokes when I was using an EnGenius ENH500v3 wifi bridge. This bridge had some sort of networking problem where pings would normally take a few milliseconds, but every 30 seconds or so they would take over a second. I presumed that TCP/IP would take care of any missing/duplicated/re-ordered packets. Does x2go use UDP?

I replaced the ENH500v3 with a Ubquiti Nanostation Loco (a *far* better product) and the problem immediately went away.

Regards, Michael

On Wed, Jul 17, 2024 at 05:19:50PM +0200, Ulrich Sibiller wrote:

...

Hi,

I am using the windows client daily. I have never seen dropped keystrokes, but sometimes (very rarely) I have the _impression_ that key order is wrong, e.g. I write "test" and get "tset". However, I am not sure if this is the result of bad typing or if it is really happening.

You can try and verify with xev inside the session, if you can find a way to trigger keystroke dropping. You can also check if things change when using another X server on the windows machine, e.g. Mobaxterm or X410 or xming.

Otherwise I have no idea what might be the problem.

Uli

Professor Michael Ashley School of Physics University of New South Wales http://www.phys.unsw.edu.au/~mcba

I would then expect to see a similar problem when connecting from my Linux workstation to the same x2go host over the same network, but that client does not seem to have the same issue. Not sure that UDP is the culprit, but as I have not seen the code, I cannot speak authoritatively on that.

Timm

• *"It's easier to fix bugs the same day you wrote the code. It can be very hard and time-consuming to fix bugs a month later when you've forgotten exactly how the code works." - Joel Spolsky, CEO/Founder of Stack Overflow*

On Wed, Jul 17, 2024 at 3:24 PM Michael Ashley <m.ashley@unsw.edu.au> wrote:

You don't need the particular equipment I mentioned to see the problem. If x2go is using UDP for keystrokes, then there is no guarantee that the data won't be missing/duplicated/out-of-order. The rate at which you see problems will depend on the network hardware, cables, etc, as well as how close to saturation the connection is.

On Wed, Jul 17, 2024 at 02:34:24PM -0700, Uranus Hertz wrote:

...

I have none of that equipment in place in either situation. At home, over the VPN, everything is Ubiquti. At the office, over LAN everything is Cisco. they can’t use those resources for other things that truly, deeply

• "If the result of your work consumes someone’s cognitive resources,

matter. This is NOT about consuming their time and attention while they're using your app. This is about draining their ability for logical thinking, problem-solving, and willpower after the clicking/swiping/gesturing is done." - Kathy Sierra On Wed, Jul 17, 2024 at 1:06 PM Michael Ashley <[2]m.ashley@unsw.edu.au> wrote:

 I have seen massive problems with missing and re-ordered keystrokes
 when I was using an EnGenius ENH500v3 wifi bridge. This bridge had
 some sort of networking problem where pings would normally take a
 few milliseconds, but every 30 seconds or so they would take over a
 second. I presumed that TCP/IP would take care of any
 missing/duplicated/re-ordered packets. Does x2go use UDP?
 I replaced the ENH500v3 with a Ubquiti Nanostation Loco (a *far*
 better product) and the problem immediately went away.
 Regards,
 Michael

-- Professor Michael Ashley School of Physics University of New South Wales http://www.phys.unsw.edu.au/~mcba