[mythtv-users] DVI Output During Boot

David Greaves myth at dgreaves.com
Wed Jan 30 11:33:01 UTC 2008

Ginsu Squirrel wrote:
> I have my myth box connected to my TV with a DVI to HDMI cable.  I get 
> no output on the TV until the X server has started (no post, no grub, no 
> kernel messages).  I have 3 nvidia cards and one ati card.  One nvidia 
> card, an 8400GS PCI-Express, doesn't have this problem but the other 
> cards, an nvidia 5200, an nvidia 5500, and an ATI 9600 do.  Has anyone 
> seen this and is there a way to get output during boot?

I have seen something similar...

I wonder if your card is sending a signal that the TV can't display (80x25 text).

If you have a DVI monitor you can see if the card is actually displaying during
POST (I'm sure it is).

If you switch to VT 1 (ctrl-alt-F1) does that display?

If not then you may want to use the framebuffer console (fbcons) and switch
resolution. My VT's now run at 1920x1280 :)

You will need to alter grub to supply a vga= parameter. It still won't display
POST but you'll see the boot sooner.

(Nb fbcons also lets you run 'splashy' so you can have a pretty bootup sequence
- good for a TV PC.)


More information about the mythtv-users mailing list