After performing an "apt-get update && apt-get upgrade" on a Ubuntu 16.04.4 box, graphics fails to start. I use my laptop with text boot, then I log in and issue "startx", with "/usr/lib/gnome-flashback/gnome-flashback-metacity" in my ~/.xinitrc file. After update, "startx" (Xorg) returns me to character prompt. Same with KDE, and while WMaker seemed to start, I still couldn't run apps like Firefox or Konsole. Tinkering with my system for about two hours I managed to figure out that this behaviour is caused by some Virtualbox package. After issuing "apt-get purge virtualbox*", the normal behaviour returned. Fortunately I don't use Virtualbox, it was installed 'just in case', so I could remove it without affecting everyday usage. But it seems that something in Virtualbox is seriously broken.
A cut from apt's history.log after upgrade and before package removal:
After performing an "apt-get update && apt-get upgrade" on a Ubuntu 16.04.4 box, graphics fails to start. I use my laptop with text boot, then I log in and issue "startx", with "/usr/lib/ gnome-flashback /gnome- flashback- metacity" in my ~/.xinitrc file. After update, "startx" (Xorg) returns me to character prompt. Same with KDE, and while WMaker seemed to start, I still couldn't run apps like Firefox or Konsole. Tinkering with my system for about two hours I managed to figure out that this behaviour is caused by some Virtualbox package. After issuing "apt-get purge virtualbox*", the normal behaviour returned. Fortunately I don't use Virtualbox, it was installed 'just in case', so I could remove it without affecting everyday usage. But it seems that something in Virtualbox is seriously broken.
A cut from apt's history.log after upgrade and before package removal:
virtualbox:amd64 (5.0.40- dfsg-0ubuntu1. 16.04.2, 5.1.34- dfsg-0ubuntu1. 16.04.2) dkms:amd64 (5.0.40- dfsg-0ubuntu1. 16.04.2, 5.1.34- dfsg-0ubuntu1. 16.04.2) guest-additions -iso:amd64 (5.0.40- 0ubuntu1. 16.04.1, 5.1.34- 0ubuntu1. 16.04.2) guest-dkms: amd64 (5.0.40- dfsg-0ubuntu1. 16.04.2, 5.1.34- dfsg-0ubuntu1. 16.04.2) guest-utils: amd64 (5.0.40- dfsg-0ubuntu1. 16.04.2, 5.1.34- dfsg-0ubuntu1. 16.04.2) guest-x11: amd64 (5.0.40- dfsg-0ubuntu1. 16.04.2, 5.1.34- dfsg-0ubuntu1. 16.04.2) dfsg-0ubuntu1. 16.04.2, 5.1.34- dfsg-0ubuntu1. 16.04.2)
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virtualbox-qt:amd64 (5.0.40-