[vdr] PCI fun (RGB/PAL over VGA at variable frame rate)

Theunis Potgieter theunis.potgieter at gmail.com
Sat Aug 16 14:13:37 CEST 2008

Would be nice if someone could test the AMD Athlon 64 2000+ on a AMD
platform, the 780G chip set on a microATX board, because it can do HD
resolution (1920x1200) with high picture quality is possible through
DVI/HDMI ports.

On 16/08/2008, Gavin Hamill <gdh at acentral.co.uk> wrote:
> Hi all,
> Over the last days, Thomas and I have been trying to sort out why my
> nearly-identical machine couldn't run his VGA sync patches properly.
> The key difference is my Radeon 7000VE is PCI, whilst his is AGP. I
> tried the PCI Radeon in two old Pentium-3 era machines, and on my modern
> Pentium D930 desktop, all with the same behaviour - fullscreen video
> over PCI causes huge CPU usage in the Xorg process, even when using xv
> 'acceleration'.
> When I switch the PCI Radeon for a PCI Express X300 (the very lowest 'X'
> series you can get), everything is glorious: Xorg CPU use is barely 1%.
> Unfortunately I don't have any machines with both AGP and PCI on which
> I can try the same OS image but we both think it's safe to conclude that
> PCI is just unsuitable for this task.
> Many thanks to Thomas for writing the patches in the first place, and
> also for the time he's spent logged into my machine remotely trying to
> solve the problem!
> Cheers,
> Gavin.
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> vdr at linuxtv.org
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