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Old 08-27-2013, 08:59 PM   #1
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VGA Boot modes to set screen resolution
I used vga=771 to live boot with a Radeon hd6450 video card. I do not understand why this fixed it.
Old 08-28-2013, 08:25 AM   #2
Registered: Dec 2012
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Generally you don't need the vga kernel parameter anymore since nowadays KMS (kernel mode setting) is the default and usually sets the optimal screen resolution by itself.

The only case I know in which you need the vga kernel parameter is if you're using a Radeon video card with fglrx, since this driver still doesn't support KMS.

In this case you can find out the correct value for your card and monitor by setting vga=ask. When you have chosen the correct resolution you can change vga=ask to vga=<chosen value>. Keep in mind that it can take decimal and hexadecimal values. From the table you linked to you can set either vga=795 or vga=0x31b for getting 1280x1024-24. As far as I know vga=ask usually gives you the hexadecimal values.
Old 08-28-2013, 09:39 PM   #3
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Thanks, I'll stick with what I have right now as it does work and it took me a long time to find it. Ian.


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