id summary reporter owner description type status component version resolution keywords cc guest host 4850 Dynamic resizing stopped working Viktor Ferenczi "=== Environment === I've '''8Gbytes of RAM''' and an '''Intel Q6600 CPU''' (4 cores, 64 bit support), all working fine for 21 months. It is an entirely new 64 bit Ubuntu 9.04 host installation (on new HDDs), no third party applications installed on the host OS other than available from the Ubuntu repositories without any trickery. The host OS is up to date. I use Gnome with almost the minimal number of Compiz desktop effects. I've an '''nVidia Corporation GeForce 8600 GT (rev a1)''' graphics card with 512Mbytes of on board memory. I use '''version 180 of the proprietary nVidia Linux drivers''' installed using Ubuntu's default driver installer. It worked fine out of the box. I've successfully configured the following guest OSes: * Ubuntu 8.10 * Windows Server 2003 The '''Ubuntu 8.10''' guest was cloned from a vmdk image originally created and used in VMware Server 1.0.7. The VMware Tools was uninstalled first, certainly. The '''Windows Server 2003''' guest was created in VirtualBox, then copied a physical instance of Windows Server 2003 into the VM and fixed its boot process. All physical drivers were uninstalled first. === Problem === Dynamic resizing of guest screens worked just fine in both guests for a few hours after installing the guest additions into them. Then for some unknown reason '''dynamic resizing stopped working in both guests (possibly) at the same time''', which is strange, since they run different OSes. It happened while running both guests and doing nothing special with them. I've other guests OSes, they were not running at that time. They seem to be unaffected by this problem. I haven't used suspend or hibernation on those guests nor the host system. No snapshots of these OSes were made. Attached configuration and all the available log files for both guests. === What I tried already === * I tried to reinstall the guest additions in both OSes, it did not help. * I tried to search the forums, but found only unrelated problems or workarounds not solving my problem." defect closed guest additions VirtualBox 3.0.4 fixed dynamic resizing other Linux