Greetings, Warren Young! >> Call "man" on a sufficiently long topic. man bash would be quite sufficient. >> Or just `less` a long enough text. >> Hold down "End" key. >> The screen buffer will jump and tear repeatedly, until you release the key.
> That sounds like a video card performance issue, not a Cygwin, mintty, or > less issue. I can't believe it is a gfx performance issue, as I can't reproduce it with PuTTY in the same situation. I.e. native console/local less = jumping and tearing. mintty/local less = jumping and tearing. native console/ssh+less = jumping and tearing. mintty/ssh+less = jumping and tearing. putty+less = no jumping, no tearing. Let's try a different approach. The video id is ne3VmLZmD9g on a well-known tube hosting service. > I just tried it here on a VM hosted on a box with an NVIDIA GeForce GTX > 680MX GPU, and all I saw was normal redrawing, with scarcely any tearing. > That chip is about 3 years old, which probably still outperforms any current > CPU-integrated GPU. > There are some small mitigations that might help. > One would be to convince the maintainers of less to be smarter about > repainting the whole screen when it isn’t necessary. But given that they > haven’t fixed the horizontal scrolling bug in the ~20 years I’ve been using > it, I wouldn’t hold out hope on that front. Well, let's say, this is unconvincing. > Another would be to make mintty double-buffer its screen, if it doesn’t > already. That won’t help with the clear-screen call less is currently > making, but it might reduce the tearing effect. > The same thing is happening with something like “ls -lR /“. The only > difference is that you can easily see what’s going on in the “man bash” > case, since the content remains static. > Another way to see it is “vim /etc/sshd_config”, then hold down Ctrl-L. I'm not familiar with vi/m, so I'll just trust you on the matter. -- With best regards, Andrey Repin Tuesday, September 15, 2015 06:47:19 Sorry for my terrible english...
