Autoscroll problems on Linux
Posted: Wed Feb 03, 2021 3:33 am
Thanks so much for CoolTerm - I use it for teaching, because the setup is simple on all platforms and it doesn't get in the way. I have a few minor feature requests which I might drop in here someday, but it's almost perfect for this purpose.
However this is a bug report. On Linux (at least on Ubuntu 20.04, confirmed on multiple machines) the autoscroll doesn't work well. Once the text fills the pane, every new line causes the scrollbar to flicker between the top and bottom of its travel - it seems that the view scrolls to the top and then immediately back to the bottom. If data is arriving quickly, this makes it flicker continuously and renders it unreadable. The only workaround is to set the receive buffer small enough that scrolling doesn't take place, but the required receive buffer size depends on line length so it's not easy to set.
This isn't urgent; most of my students are using Windows or OS X, so this doesn't affect many of them. It affects me, but that's less important! It would be great if there was a fix though. I noticed in the release notes for 1.7.0 "[Win] Improved autoscrolling code to avoid flickering and undesired shifts of the scroll position" - no idea if this is related to this bug of course but it does sound similar.
Thanks again.
However this is a bug report. On Linux (at least on Ubuntu 20.04, confirmed on multiple machines) the autoscroll doesn't work well. Once the text fills the pane, every new line causes the scrollbar to flicker between the top and bottom of its travel - it seems that the view scrolls to the top and then immediately back to the bottom. If data is arriving quickly, this makes it flicker continuously and renders it unreadable. The only workaround is to set the receive buffer small enough that scrolling doesn't take place, but the required receive buffer size depends on line length so it's not easy to set.
This isn't urgent; most of my students are using Windows or OS X, so this doesn't affect many of them. It affects me, but that's less important! It would be great if there was a fix though. I noticed in the release notes for 1.7.0 "[Win] Improved autoscrolling code to avoid flickering and undesired shifts of the scroll position" - no idea if this is related to this bug of course but it does sound similar.
Thanks again.