Comment 13 for bug 459512

Revision history for this message
Mark Shuttleworth (sabdfl) wrote : Re: [Bug 459512] Re: X server aborts if two primary devices found

On 26/10/09 12:55, Steve Langasek wrote:
> Is it possible for you to confirm whether plugging the monitor into the
> other card does cause the crash with white?
>

Interestingly, it did not cause a crash. So, white worked in the case
where the monitor was connected to the card it picked, and it did not
crash when the monitor was connected to a different card.

More interestingly, though, the monitor stayed completely dark when it
was connected to the other card. The BIOS and boot sequence just didn't
display at all. It's as if the top card (the one picked by white) is
used at POST. I don't know if that's just luck, or if it's some
convention in the BIOS, or how this is generally determined, but trying
to boot with the monitor connected any other way just shows nothing.

The machine does boot, however, so I captured a Xorg log for that case.
It shows no crash, but it shows that there were no connected monitors.
Interestingly, plugging a monitor in after the boot did not bring
anything up on that monitor.

I don't think this provides enough new insight to decide what the likely
impact of the patch is on the average dual-card system, or other systems.

Mark