I've recently installed ubuntu 13.10 64bit on a desktop (UEFI mode). After the plymouth splash i get a black screen. After some experiments I found a temporary solution:
- switch back to tty1 and login
- get an awful error:
(unity-greeter:2109): Gtk-WARNING **: cannot open display: Failed to launch bus: Failed to launch session bus
- after reboot unity-greeter starts up just fine until logoff
- (after graphical login a procedure to report an Xorg crash starts)
I have an Nvidia graphics card, I tried all drivers (nouveau, currunt, experimental, xorg-edgers etc) but there was no change (with the exception of the xorg-edgers that always gave the corrupted configuration prompt, which, sadly, didn't solve a thing).
Any help/suggestion is appreciated :)
EDIT: After some experiments (see comments to answers) the problems came to be more random. At the moment it seems not to present itself when there is an Xorg problem (apport starting just after login) but sometimes I get a clean start even when there is no error to report. I think there's a link between "having an Xorg error" and "starting unity-greeter/lightdm correctly" because I tried using a faulty mouse (pointer stuck at boot with both win7 and ubuntu) and in that case unity-greeter/lightdm always starts (but of course then I have to disconnect the faulty mouse...).
I was asked for logs: I'll provide them the next time the problem presents itself (I'll try some reboots but I don't know when it will happen again :( ).
I was also asked for info about hardware and configuration:
*-display description: VGA compatible controller product: GF116 [GeForce GT 640 OEM] vendor: NVIDIA Corporation physical id: 0 bus info: pci@0000:01:00.0 version: a1 width: 64 bits clock: 33MHz capabilities: vga_controller bus_master cap_list rom configuration: driver=nvidia latency=0 resources: irq:89 memory:fc000000-fdffffff memory:d0000000-d7ffffff memory:d8000000-dbffffff ioport:e000(size=128) memory:fe000000-fe07ffff
lspci -vrelevant info:
01:00.0 VGA compatible controller: NVIDIA Corporation GF116 [GeForce GT 640 OEM] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. Device 2319 Flags: bus master, fast devsel, latency 0, IRQ 89 Memory at fc000000 (32-bit, non-prefetchable) [size=32M] Memory at d0000000 (64-bit, prefetchable) [size=128M] Memory at d8000000 (64-bit, prefetchable) [size=64M] I/O ports at e000 [size=128] [virtual] Expansion ROM at fe000000 [disabled] [size=512K] Capabilities: <access denied> Kernel driver in use: nvidia
Xorg version: 7.7 (
apt-cache show xserver-xorg | grep Versiongives:
- Nvidia driver version: 331.20 (from x-swat ppa)
I can't think of other info that could be needed, if you can just say so :)
EDIT: it has been 3 days since the last time the error presented. Nothing changed in the system (at lest not by my doing) so I have no idea of what caused it and what solved it. Thanks to everybody that helped, I'll post updates if (and when) I'll have black screen again...