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Since Ubuntu 12.04, My Insignia TV says no signal on VGA after booting. I switched to HDMI and all is well but there is no audio output. After logging in to my account, I can switch back to VGA and then all is fine. How do I change the startup resolution so it can display on VGA?

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Do you have both connected at boot? – Mitch Jun 3 '12 at 7:09
Are you using nvidia driver? – Ravi Jun 3 '12 at 7:52

I figured something out, and just hoped it would help someone else. I tried everything. On the main screen with all the log-in names, there are no display options, yet it is too high to work right. Once logged in, of course you have resolution options. I had nothing to lose, so I reinstalled Ubuntu (which I LOVE by the way). On the set up screen where it asks if you want to try or install, the top right-hand option is 'settings' but after you install changes to a power button. If you change the resolution BEFORE installing, it will keep the setting for the log-in screen. After the install, it apparently sets itself. Now everything works fine on VGA. Thanks for the ideas. I hope this helps someone else.

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Sorry, I forgot to mention that my graphics card is the XFX ONE (ON-XFX1-PSR).

I do have both connected at boot now, only because if I only have VGA plugged in, I can view the initial boot screen of my computer starting up, but when it gets to the login screen, I get ''mode not supported'' on my TV. I think the resolution must be too high on the login screen (where it shows all the users) because once I switch to HDMI, all the letters are small. Once I log in on HDMI, it goes to ''mode not supported'' on my TV and when I switch to VGA everything is fine from there on out.

I tried solution 1 above but it made no difference. I'm scared to try number 2, because I'm unclear exactly how to add that to the end (space?).

I also can go to settings>hardware>additional drivers, and it finds 2 ATI/AMD proprietary drivers, but the first is the ''post release updates''. When I install the initial one and reboot it makes no change. When I try to install the updates, it fails and deactivates the first one. It also makes videos smaller when I go to full screen in Youtube. Thanks for the help.

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I know why the 1st doesn't works (it doesn't affects Ubuntu) – espectalll Jun 5 '12 at 20:52
If you want to do the second... – espectalll Jun 5 '12 at 20:53
A screen with some options appears before booting Ubuntu? – espectalll Jun 5 '12 at 20:54
And... What? Smaller videos in YouTube? :/ – espectalll Jun 5 '12 at 21:10

NOTE: if you do this wrong, you will lose your computer! (at least, before repairing the boot)

  1. Open a terminal from the dash.
  2. Paste this: sudo gedit /boot/grub/menu.lst
  3. Search a line which shows something like this: kernel /boot/vmlinuz-2.6.15-26-386 root=/dev/hda5 ro quiet splash
  4. At the end of the line, add, for example, vga=791 (more info at Wikipedia and at Ubuntu Forums)
  5. Save the file.
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