I have the same problem on Ubuntu 14.04. It happens with "screenshot", "PrntScr" key, or "gnome-screenshot" from terminal. Screen shot used to work for me.
To recover from the "WHITE SCREEN": switch to terminal (Ctrl + Alt + F1) and kill the "gnome-screenshot" process, then switch back to desktop (Ctrl + Alt + F7). I believe the problem is due to permissions on the file ~/.local/share /recently-used.xbel in the user's home folder. In my case, this file was owned by root. I assume this happened due to doing a printscreen as sudoer, but I'm not how exactly this happened in my case. Once I changed the owner and group back to my user, all the above methods of screenshot work again without causing a white screen. (sudo chown user:user ~/.local/share/recently-used.xbel) Hope this helps! -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-screenshot in Ubuntu. https://bugs.launchpad.net/bugs/1194509 Title: Screenshot area is greyed out Status in gnome-screenshot package in Ubuntu: Confirmed Bug description: Hi. I've got a funny issue here that I cannot quite describe. Sometimes, when I want to take a screenshot (using the built in screenshot tool or an external screenshot tool like Screen Cloud) the screen just blanks out. gnome-screenshot produces a fully grey image (will attach). I expect it to take a full screen image of my desktop. Using the "select area and screenshot" tool of Screen Cloud used to grey out the entire screen and only show the shadow of the notification bar, but I've since reinstalled Ubuntu and now it greys out everything apart from the notification bar and the dock at the side. I will attach a photo of this, since I obviously cannot take a screenshot of this behaviour. Interestingly, the first time it happened on this new installation of Ubuntu, it blanked out most of what I described above apart from about half an inch from the bottom of the screen, just enough to show a part of the Chrome downloads bar. This happens seemingly at random, and then stays like this until I reboot. As I said, this happened across two installations (12.04 upgraded to 12.10 and later to 13.04 and a fresh 13.04 installation), so this is likely a problem with my hardware. I will attach appropriate information momentarily. gnome-screenshot: Installed: 3.6.1-0ubuntu2 Candidate: 3.6.1-0ubuntu2 Version table: *** 3.6.1-0ubuntu2 0 500 http://gb.archive.ubuntu.com/ubuntu/ raring/main amd64 Packages 100 /var/lib/dpkg/status Also, in an attempt to fix this I've asked about on Ubuntu Forums about this error. ibjsb4 suggested reinstalling gnome-screenshot or using Shutter, but neither of these suggestions helped. He also suggested running gnome-screenshot from terminal, but that just takes a grey screenshot as normal and doesn't output anything in the terminal. --- ApportVersion: 2.9.2-0ubuntu8.1 Architecture: amd64 DistroRelease: Ubuntu 13.04 EcryptfsInUse: Yes InstallationDate: Installed on 2013-06-09 (15 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424) MarkForUpload: True Package: gnome-screenshot 3.6.1-0ubuntu2 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 3.8.0-25.37-generic 3.8.13 Tags: raring Uname: Linux 3.8.0-25-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screenshot/+bug/1194509/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

