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3:09:44
pillton
FYI I also see the scrolling artefacts the others are reporting in my application. This morning, I tried to create a minimal example but failed. This is using a Parallels VM to run Ubuntu 18.04 without Wayland. The artefacts go away when using (setf clim:*default-server-path* '(:clx-ttf :mirroring :single)).
3:11:14
pillton
The problematic pane displays content using formatting-table followed by a number of histograms.
3:11:50
pillton
The artefacts go away when moving the window. I am not sure if that occurs for the others.
5:33:27
jackdaniel
I will call it a mean haisenbug paradox - the bug is apparent to anyone except from the person ought to fix it
6:03:17
rain3
jackdaniel: what are the steps to check if this bug happens on my machine. if it happens I can give you access (if that helps)
6:33:35
jackdaniel
then scroll up to the top - if the text is jumbled then you can reproduce the issue
7:48:37
rain3
reproduced, the machine is waiting for you to connect and hack on it , I will pm the connection details
11:39:32
random-nick
I found out that if I patch mcclim's clx backend to always request composited windows then the issue is much more consistent (works on gnome on xorg in the vm, works without display compositing on xfce4, doesn't disappear when I hover the close button or move/unfocus the window)
11:43:10
random-nick
redirectwindow is supposed to be called by compositors in order to tell xorg to render the window in a image buffer instead of directly on the screen, but it seems that compositors don't always call that and in some cases might unredirect windows