i hope i can help to make it reproduceable , i have nearly the same problem with my raspberry. With the User "PI" it works fine. with the user "blabla" (mentioned below) it works partly.
#error described: -user blabla connects to pi , -blabla get the sesman log window and then the prepared desktop (like 2 seconds white grey stripes) - when the desktop is fully loaded i see the wastebasket but the launchbar isnt there the visual effect is : there is a white place holder where the launchbar is. which seems to be reloaded every second which result in flickering because the white place holder reappear every time. after some minutes i get a disconect which isnt the case with the "pi" user for reproduktion :) Raspbian Wheezy Release date: 2015-05-05 Kernel version: 3.18 Xrdp version 0.5.0-2 , the pi is used with remote desktop program(not the windows one) and was only on a physical display for ssh activation and gui activation (MAYBE 1 time with gui on physical monitor i cant remember) the normal way is then -connect via ssh and make the pi rdy for XRDP -sudo apt-get update -sudo apt-get upgrade -sudo apt-get install xrdp -sudo adduser blabla here i got the first flickering and thought it was permission stuff so i added blabla to root with -sudo visudo but the error remains. while writing i thought about to get into the new user - 1 time with physical monitor and set the launcher . and try xrdp again hope it helps abit -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/375755 Title: 9.04: xrdp 0.4 + vnc4server results in flashing screen on login To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xrdp/+bug/375755/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs