On Tue, Feb 24, 2009 at 11:18 AM, Adam Jackson <ajax@xxxxxxxxxx> wrote:
So if I read you right... Since I have a 1600x1050 LCD display...
and there is a 2048 limit, then my 2nd display could only be 448 pixels wide? ;-(
I would have expected dual-head to imply (given the 2048 restriction)
that I could have two displays up to 2048 wide. ie. an internal display
at 1600x1050 and an external display at 1280x1024 (for example)
Right now, I haven't figured out a way to get the VGA connector to emit
'different' data than whats on the LCD.
Forgive my ignorance, but why should I care about 'virtual size'?
I thought 'virtual size' simply allowed the 'physical screen' to scroll around
on the 'virtual screen'. Or does it mean that I need a 'really big' virtual
screen that has two physical screens consuming parts of that 'virtual screen'?
On Tue, 2009-02-24 at 10:02 -0500, Fulko Hew wrote:If it's an intel chip, or a radeon chip, or an nvidia chip newer than a
> I've been curious about dual-headed operation for some time now,
> and either because I'm using old software, or my hardware doesn't
> support it, I've never been able to get it to work. It could also
> be because I don't know, or can't properly perform the correct
> magic incantations.
>
> But the first question is always:
> 'How can I tell if my hardware is capable of dual-headed operation'?
geforce 7 series, then it is dual-head capable. nvidia chips should get
even more support as we move to nouveau.
There may be _limitations_ on how dualhead you can be. For example:
Intel 915 and 945 series chips have a coordinate limit at 2048 pixels
> 00:02.0 VGA compatible controller: Intel Corporation Mobile
> 945GM/GMS, 943/940GML Express Integrated Graphics
> Controller (rev 03)
wide. This manifests in ugly ways, but the short answer is that if
you're trying to do something wider than that (like two 1280x1024
displays next to each other) then it's not going to work right. That's
partly a hardware limit, and partly a software limit that's really hard
to fix.
So if I read you right... Since I have a 1600x1050 LCD display...
and there is a 2048 limit, then my 2nd display could only be 448 pixels wide? ;-(
I would have expected dual-head to imply (given the 2048 restriction)
that I could have two displays up to 2048 wide. ie. an internal display
at 1600x1050 and an external display at 1280x1024 (for example)
Right now, I haven't figured out a way to get the VGA connector to emit
'different' data than whats on the LCD.
We also still don't do memory management as well as we ought to, which
means you may need to explicitly set the Virtual size to allocate in the
config file to get the size you want.
Forgive my ignorance, but why should I care about 'virtual size'?
I thought 'virtual size' simply allowed the 'physical screen' to scroll around
on the 'virtual screen'. Or does it mean that I need a 'really big' virtual
screen that has two physical screens consuming parts of that 'virtual screen'?
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