[mythtv-users] High X CPU usage with 8400GS

[Jim Stichnoth]

On Thu, May 28, 2009 at 8:43 AM, Jean-Yves Avenard <jyavenard at gmail.com> wrote:
> Hi
>
> 2009/5/29 Jim Stichnoth <stichnot at gmail.com>:
>> I bought an 8400GS graphics card
>> (http://www.newegg.com/Product/Product.aspx?Item=N82E16814187042) to
>> try out VDPAU.  The old card was a 7200 series.  With the 8400GS, the
>> X process is taking up nearly 100% CPU utilization during myth
>> playback, with visible tearing in the middle of the screen.  This
>> happens even during SD playback.  The 7200 uses only 30-40% CPU during
>> similar playback.  This is with the 180.51 drivers, and without VDPAU.
>>  Running nvidia-settings, and examining the X logs, shows that the
>> nvidia driver is being used.
>>
>
> Did you create a VDPAU playback profile ?
>
> Unless you do, you're not using VDPAU

I know that I'm not using VDPAU yet.  I'm just surprised that under
non-VDPAU conditions, this VDPAU-capable 8400 card causes so much CPU
load compared to the 7200 card.  I'm wondering if this is related to
the fact that the 8400 is a PCI version -- maybe the CPU is maxed out
by sending the decoded 720p video stream over the PCI bus, which
presumably wouldn't happen when VDPAU is doing the decoding.

Jim