ubuntu-x-swat team mailing list archive

[zwaardmeester <755715@xxxxxxxxxxxxxxxxxx>]

Hi Tormod, others,

thanks for helping. With "sometimes" I meant that fail-safe boot does
work, but normal booting (with KMS on) is not.

The black screen appears right after the initial stage (with the
blinking cursor), so it might have something to do with KMS. I can see
the screen slightly changing color from black to dark grey a couple of
times, and my TV turns entirely green (!!).

I did some additional testing and found out that the problem lies with
the TV-Out and KMS. I have an old-school CRT television connected with
S-video to my videocard. I found out that:

- booting with S-video cable connected, TV stand-by or turned on, gives black screen (green on TV). 
- booting with S-video cable disconnected is succesful. I have now only the main LCD screen, after plugging in the cable again i can use the TV through the "Monitors" menu. 
- booting with the GRUB-option "nomodeset" is also succesful. I will use this as a workaround. 

What other things would you like me to report on this matter?

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https://bugs.launchpad.net/bugs/755715

Title:
  radeon 3870 x2 sometimes gives black screen at startup