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0e1f616
(Get the code!)
Hi Bryce,
We've had a development regarding this bug.
I applied a BIOS update for this Toshiba machine, in connection with bug 719620 which was also affecting this system.
The versions the machine shipped with were:
System BIOS Version: 1.40 (dated 12/13/09)
EC Version: 1.30
I downloaded an update that was published on May 25th, 2011. This bumps the BIOS to the following versions, as can be verified in the setup screen accessible by hitting F2:
System BIOS Version: 3.10
EC Version: 1.90
With this new BIOS, connecting an external screen when the system is up and running works fine and just as expected: the new screen is detected and immediately starts displaying (starts up as additional desktop space to the right of the primary display). Things go back to normal on the primary display when I disconnect the external screen.
This update also made bug 719620 go away, so it looks like the machine, as shipped to us, had quite a buggy BIOS to begin with.
So far I've only tried this with Natty (kernel 2.6.38-8), I'll update in a bit with results from Maverick (2.6.35).
Please let me know if you'd like me to perform other tests to validate this. I won't touch the bug's status as I'm not sure how to proceed when a bug gets "fixed" by a BIOS update.
Also, please let me know if I should update on the upstream bug as well.