screen locker breaks multi-montor setup

[Cal]

When using the screen lock in KDE with the open source radeon drivers, unlocking the screen changes the size of the virtual desktop space. In a three monitor setup, the left monitor is correct, the center monitor is cut off in the middle of the screen, and the right monitor is unusable with graphic artifacts from the center monitor. (The mouse cursor can move to the middle of the center monitor only)

Additionally, the panels are moved to the left monitor. The only way to reset is to kill X and log in again. Then the panels are sometimes saved on top of each other on the left monitor and I have to move them back.

I have also tried this with the proprietary AMD driver. Same issue happens, but
the AMD driver seems to have larger problems -- the screen order and rotation settings
are changed around, and the entire display config needs to be set up again.

Please let me know if you need any other information or screenshots.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: kscreensaver 4:4.11.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-19.33-generic 3.11.10.5
Uname: Linux 3.11.0-19-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Tue Apr 1 09:39:08 2014
InstallationDate: Installed on 2014-03-19 (12 days ago)
InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MarkForUpload: True
SourcePackage: kdeartwork
UpgradeStatus: No upgrade log present (probably fresh install)

[Harald Sitter (apachelogger)]

Hi there!

Thanks for reporting this bug! Your bug seems to be a problem with the KDE program itself, and not with our KDE packages. While we appreciate your issue, it would be better if it was tracked at https://bugs.kde.org, so that the KDE developers can deal with this speedily and have direct communication with you as the reporter for more effective debugging.

Thanks!

[Cal (cal-fbsdata)]

Thank you. For reference I submitted this KDE bug: https://bugs.kde.org/show_bug.cgi?id=332982