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I have been trying this for a while but no luck. I installed ubuntu-11.10-desktop-i386 twice. Also installed guest additions. However I always get maximum screen resolution as, 1024 x 768.

Do I need to change anything in /etc/X11/xorg.conf file (example) ? Presently there is no such file in that path. Also, please let me know what should be contents of the file for 11.10 version ? Thanks.

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We need more hardware information to help you, can you look at this question and then edit your question adding the information. – Jorge Castro Oct 29 '11 at 19:29
Am guessing he is referring to installing ubuntu-11.10-desktop-i386 in the virtualbox an using ubuntu as the host. – Luis Alvarado Oct 29 '11 at 19:38
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You need to make sure that Guest Additions are really installed. Then you may find this answer helpful. – Takkat Oct 29 '11 at 21:22
@LuisAlvarado, actually I have windows XP as host and I am trying to install Ubuntu Oneiric as the guest. – iammilind Oct 30 '11 at 3:24
@Takkat, thanks your links were useful. I deleted everything and reinstalled everything from scratch and it worked. – iammilind Oct 30 '11 at 6:48
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3 Answers

up vote 0 down vote accepted

This is likely a VirtualBox issue, rather than an Ubuntu issue.

I have had the same problem repeatedly before. Sometimes removing and re-installing the Additions solved this. Or simply forcing VirtualBox to actually load them, and not just download them.

Unfortunately, is still re-occurs. I have found that updating VirtualBox (to a newer build) sometimes makes this worse AND sometimes solves it thi. That makes this a recurring regression issue ..

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up vote 2 down vote

I just installed Ubuntu 12.04 on VirtualBox 4.1.4, but couldn't get it to work on higher resolution, even after installing and reinstalling the VBOXAdditions. Desperate, I installed the VBOX 4.1.14 and reinstalled many times the VBOXAdditions, but without any success. Finally, the solution that solved the problem, was to increase the video memory (in VBOX setting for Ubuntu) from starting 12 MB, to 48 MB (which still did not enable resolution 1366x768), and than to 128 MB. After restarting Ubuntu everything works perfect, 1366x768 is my default resolution. I hope this will help in your problems. Cheers!

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Thanks. This did it for me as well. – Martin Scharrer May 1 at 9:10
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up vote 1 down vote

This worked for me and I am running VirtualBox 4.1.8 and Ubuntu 11.10.

sudo apt-get install virtualbox-ose-guest-utils virtualbox-ose-guest-x11 virtualbox-ose-guest-dkms

Found it on this site under a slightly different question Higher screen resolution in VirtualBox?

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This worked for me. After installing the packages specified above and restarting VirtualBox the screen resolution in Ubuntu would adjust whenever I resized VirtualBox. – shanewwarren May 7 at 20:54
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