On Thursday 05 May 2005 10:16 am, Jenny Hopkins wrote:
If I have only one monitor plugged in to first socket, I get a single console display as normal. If I plug only one monitor in to the second, adaptor socket, I can work blind and get some very odd behaviour. As the bios would display, the "No signal" message moves slowly down the screen then returns to the centre and is still at what would be the LILO menu waiting for input. If I hit enter, the "No signal" message moves slowly UP as I would see the kernel boot text scrolling on screen, then remaining still after machine has booted.
Pretty odd, but I would suggest that it is coincidence. Many screens move the "No Signal" banner around to avoid screen burn, if you unplug the monitor from the machine you should see a cycle of the same behaviour every few minutes.
It is possible for some sync pulses getting through the VGA input to be effecting screen position, but usually the presence of these pulses would cause the "no signal" message to vanish.
As to why it has stopped working. I can only think that it is some X configuration post startup that hadn't come into effect until you restarted the system....I assume screen two only fires up once X has started ?
In very rare cases I have seen Monitors get confused and only accept a signal after they have been unplugged for a few moments.
Wayne