[Bug 983649] [NEW] Ubuntu 12.04 live CD boots into an invalid video mode (nVidia GT 520, DVI-D, Dell U3011)

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When I boot the Ubuntu live CD on my tower computer, my monitor displays
the following message:

"The current input timing is not supported by the monitor display.
Please change your input timing to 2560x1600 at 60Hz  or any other monitor
listed timing as per the monitor specifications."

The video card is a "ZOTAC ZONE GeForce GT 520 [ZT-50602-20L]".
The monitor is a Dell U3011.
They are connected using DVI-D.
This was reproduced using the 12.04 daily build from April 16, 2012.

I tried booting with various "vga=" modes (from the
"VESA_BIOS_Extensions" page on Wikipedia) but they all result in the
same error.

If I connect a 24" Dell flatscreen (using DVI-D) and reboot the live CD,
Ubuntu comes up in a working video mode.

Once Ubuntu is installed I can reconnect the 30" monitor and it works
fine in 2560x1600.

** Affects: libdrm (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
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Ubuntu 12.04 live CD boots into an invalid video mode (nVidia GT 520, DVI-D, Dell U3011)
https://bugs.launchpad.net/bugs/983649
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