id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host 7857,VM locks up under heavy disk activity,Sam Morris,,"Since Virtualbox 3.0 I (and another user I know) have experienced semi-repeatable lockups of our Virtualbox VMs when the guest OS tries to do a lot of disk I/O. The symptoms are that the guest display stops updating; though the mouse still moves, it does not respond to clicks (we're using the guest additions though so I guess the mouse moving does not really mean anything). The guest kernel responds to low level networking stuff, enough to return a 'connection refused' message to the host when I try to SSH in to see what's going on. I haven't reported this until now because it is not possible to trigger this bug reliably, and the guest's log file doesn't contain anything useful; however I ran into it five times in as many days in the following circumstances: 1. Run 'wineboot' from wine 1.3.9 (creates ~/.wine, containing a lot of small files ~/.wine) 2. Run 'git merge' with a sufficiently complex merge 3. Copy a lot of files to a vboxsf shared folder on the host Over the months I have tried tweaking various guest settings, such as enabling/disabling the virtual disk controller cache, trying a PATA virtual disk controller rather than SATA, etc) but no existing open seems to make a difference. My host is Windows 7 on amd64, and my guest is Debian GNU/Linux using 2.6.32.",defect,closed,other,VirtualBox 3.2.12,duplicate,,,Linux,Windows