I alluded to this issue already in a thread about using large displays with this class of machine, but the problem has expanded enough to justify its own thread.
The symptoms: If the machine is booted with a maximum-sized display attached to the GeForce 6600 (the regular one, not the low-end LE version), or – now – if it is woken after sleep regardless of monitor configuration, it does not provide a video signal; if the KVM is switched away and then back it fails to register that it has had its peripherals returned; and after about a minute of apparently being frozen, the fans all kick up to maximum velocity, with no further changes if you then wait longer. The only way I can recover it from this state is to hold down the power button until it forces the power off.
When the machine does boot, it will only show a full-size picture (on monitor port 2 of the video card) if monitor port 1 of the video card is already displaying a picture. Running it single-headed at maximum resolution is simply not possible, though if you have a monitor with two inputs, you can run both heads to the same monitor and simply switch to the higher-resolution signal after successfully booting with the other one.
I can find no mention of these issues anywhere online, and the “won’t boot to a maximum-resolution picture” issue stayed the same when I had to replace the video card (the replacement was with the same model). I feel the video card must be close to the root of the problem, though, because the “won’t wake from sleep” thing is a new development since the replacement.
The symptoms: If the machine is booted with a maximum-sized display attached to the GeForce 6600 (the regular one, not the low-end LE version), or – now – if it is woken after sleep regardless of monitor configuration, it does not provide a video signal; if the KVM is switched away and then back it fails to register that it has had its peripherals returned; and after about a minute of apparently being frozen, the fans all kick up to maximum velocity, with no further changes if you then wait longer. The only way I can recover it from this state is to hold down the power button until it forces the power off.
When the machine does boot, it will only show a full-size picture (on monitor port 2 of the video card) if monitor port 1 of the video card is already displaying a picture. Running it single-headed at maximum resolution is simply not possible, though if you have a monitor with two inputs, you can run both heads to the same monitor and simply switch to the higher-resolution signal after successfully booting with the other one.
I can find no mention of these issues anywhere online, and the “won’t boot to a maximum-resolution picture” issue stayed the same when I had to replace the video card (the replacement was with the same model). I feel the video card must be close to the root of the problem, though, because the “won’t wake from sleep” thing is a new development since the replacement.
