Created attachment 6028 [details] Correct Arrange of Icons Looks like a misplacement bug has shown up between 4.11 until 4.12 final release. I'm using XFCE 4.12 from Fedora COPR and saw a misbehaviour when pressing "Arrange Desktop Icons". The icons magically disappear, get aligned elsewhere, show up again, go away and so on. The only way to get them back is going into "Desktop Settings -> Icons -> Change Icon Type to something else and then back". Attached 3 Screenshots. This didn't happen with 4.11, so this must be a quite close recent change inside GIT.
Created attachment 6029 [details] Incorrect Arrange of Icons (After pressing Arrange Desktop Icons)
Created attachment 6030 [details] After changing Icon Type and then back. The Trashcan icon is missing. Please note: It may be necessary to try this when using the desktop for quite a few hours. I also have an external Monitor that I turn on and off whenever necessary.
@Ali: this regression got introduced during fixing #11266 The commit where the bug is introduced would be this: http://git.xfce.org/xfce/xfdesktop/commit/?id=633eed4cf17491b5853df57e3dd7985a33546198
So, after rebooting my PC, I can post an update here. Having following commit included, the icons don't jump of the edge anymore. Only Trash and Filesystem will disappear. You have to press F5 to get them back: http://git.xfce.org/xfce/xfdesktop/commit/?id=7f39f313895f4678f06f24519eab5486371f9360
The following commit in my branch should resolve the placement issue: https://github.com/thad-fisch/xfdesktop/commit/72b04221eaecd67b07f4c0ff51b1525aa8d279c5
Yes, I can confirm that this fixes it. I updated my distro and everybody is happy ;) Thx for fixing it.
Pushed to master: http://git.xfce.org/xfce/xfdesktop/commit/?id=70c0ba765f6b21c7cb1a9e1e16b4144795f7c70f Thanks for testing the patch.
*** Bug 11741 has been marked as a duplicate of this bug. ***
*** Bug 11792 has been marked as a duplicate of this bug. ***