Guest Ubuntu 15.04 (64 bit) Graphic Driver crashes -> probably guest out of disk space

[Aweman]

Because I habe two other issues (#14385 and #14405) with Ubuntu on Windows 10 Pro (64 bit) I reinstalled it about 10 times.

Three times, after the installation process has completed, after the first Restart (which always crashes), the installation was corrupted because of a Graphic Driver error even with Testbuild 5.0.1-101957 with AVX turned off.

See the behaviour in this video: ​https://www.dropbox.com/s/yyj4spvbqjzv5et/Ubuntu%2015.04%20Display%20Crash.webm?dl=0

[Michael Thayer]

Could you please attach /var/log/Xorg.* from the guest? Thanks.

[Aweman]

Sorry but I reinstalled it already and with this installation I don't have the problem

[Michael Thayer]

I'm sure if there is something I need to fix then someone else will notice. Thanks for letting me know.

[Aweman]

Ok I installed it two more times to recreate the bug and now I can provide you with the log files

[Michael Thayer]

Could you please describe in detail how you did the installation? The X.Org log files show that the VirtualBox Additions video driver is not correctly installed.

[Aweman]

I didn't install any driver, because it crashes within the first restart, after the Ubuntu Setup has completed

[Michael Thayer]

The request for a detailed description of the installation still stands though. Thanks.

[Aweman]

I mounted "ubuntu-15.04-desktop-amd64.iso" and made a clean installation through the Setup GUI. At the end of the setup process I restarted the VM and then it didn't boot up, instead the issue described showed up

[Michael Thayer]

Did you choose any non-default options at any point during the installation process, either while creating the machine or during the guest installation? I.e. accepting when the installed machine asks you if you want to install guest drivers from the Ubuntu repositories? Your detailed description of the installation was somewhat short: since I and many other people have done what you describe without the crashes you are seeing I would be interested to know what is different in your case.

[Aweman]

I have installed it about 14 times, 4 installations showed the issue

I made the following changes to the Default Profile of the VM:

• Base memory to 2048 MB
• Boot Order: deactivated Floppy and moved it to third position
• Set processors to 2
• Set video memory to 64 MB
• Removed Controller IDE
• Added a optical drive to SATA where I mounted the iso

then I set: VBoxManage setextradata "Ubuntu 15.04" VBoxInternal/CPUM/IsaExts/AVX 0

During the Ubuntu Setup, the only non default option I selected was during second step: "Download updates while installing"

[Michael Thayer]

So far unable to reproduce. Trying to think what else I can do here. Could you attach the logs from /var/log/lightdm on the guest when this is happening if you can get at them, or as soon after as possible (perhaps reboot to safe mode)? And does this occurs, does it always occur again if you stop the guest and restart?

[Frank Mehnert]

So far unable to reproduce. Could you also disable 'AVX2', 'XSAVE', 'SSE4.1', 'SSE4.2' and 'AESNI' in the same way as you disabled 'AVX' to see if that makes any difference?

VBoxManage setextradata "Ubuntu 15.04" "VBoxInternal/CPUM/IsaExts/AVX2" 0
VBoxManage setextradata "Ubuntu 15.04" "VBoxInternal/CPUM/IsaExts/XSAVE" 0
VBoxManage setextradata "Ubuntu 15.04" "VBoxInternal/CPUM/IsaExts/SSE4.1" 0
VBoxManage setextradata "Ubuntu 15.04" "VBoxInternal/CPUM/IsaExts/SSE4.2" 0
VBoxManage setextradata "Ubuntu 15.04" "VBoxInternal/CPUM/IsaExts/AESNI" 0

[Aweman]

It does always occur when the guest starts.

I disabled 'AVX2', 'XSAVE', 'SSE4.1', 'SSE4.2' and 'AESNI' but it doesn't change the issue

[Michael Thayer]

The third of those log files just says: "Error writing X authority: Failed to write X authority /var/lib/lightdm/.Xauthority: No space left on device". Could it really just be that your virtual disk is full?

[Aweman]

I also saw the "No space left on device" message in the log file, but there are are 2 GB left of free space on the Virtual Harddrive!?

[Michael Thayer]

I have to ask though: can you still reproduce this if you add another few GB to the drive size? Of course, that does not explain why you see this and no one else (that I am aware of - perhaps a bit of searching would be a good thing to do) does.

[Michael Thayer]

One report found so far - may or may not be related: ​http://iswwwup.com/t/adc869520c22/13-04-lightdm-crashing-black-screen-flashing-cursor.html

[Michael Thayer]

​http://askubuntu.com/questions/223501/ubuntu-gets-stuck-in-a-login-loop

Might be worth asking the lightdm people:

​http://freedesktop.org/wiki/Software/LightDM/

[Aweman]

Ok I resized the *.vdi file and then Gparted the Partitions, now I have 4 GB of free space and it works. Weird!

Thank you

[Michael Thayer]

Thank you for your patience. Perhaps someone was reporting free space wrong to someone else, or something was getting allocated and then removed again before your check - free space is a more difficult concept than it sometimes seems... Still strange that no one else is reporting this, but whatever.