[mythtv-users] Serious performance issues with Fedora Core 3 & MythTV

Matt Merkey powermatt at cfl.rr.com
Fri May 6 05:00:52 UTC 2005


Matt Merkey wrote:

> Carl Lewis wrote:
>
>> I'd lay money you need to recompile the kernel with a few bits as
>> modules instead of built-in. Particularly around
>> the DRI/AGPART (sp?) area.
>> Sorry I'm at work and don't have the details,
>>
>> Otherwise what was happening to me was that the fglrx driver
>> would give a little error message in the Xorg.0.log about
>> not being able to load DRI.
>> Even though we only need the 2D acceleration the
>> only way I could get good performance on my box (similar
>> to yours) was with all the 3d acceleration enabled,
>> and working.
>> Well except openGL overlay of course, as that won't run at the
>> same time as the XV overlay (don't you love this driver :-(
>> I also had to set the fglrxdriver to use external AGP
>>
>> Only once all the 3D stuff was working and there were no
>> little hiccups in the X log did my performance return to
>> close to what it was. Not as good, only close.
>> It now runs 30-35% for playback where it was 25-30%
>> (Pentium4 1.5GHz box)
>>
>> Cheers,
>> Carl.
>>
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>>
> Bingo... I think we've found the culprit. I'm getting the error you 
> mentioned about the DRI module in my xorg log file.
>
> [drm] failed to load kernel module "fglrx"
> (II) fglrx(0): [drm] drmOpen failed
> (EE) fglrx(0): DRIScreenInit failed!
> (WW) fglrx(0): ***********************************************
> (WW) fglrx(0): * DRI initialization failed!                  *
> (WW) fglrx(0): * (maybe driver kernel module missing or bad) *
> (WW) fglrx(0): * 2D acceleraton available (MMIO)             *
> (WW) fglrx(0): * no 3D acceleration available                *
> (WW) fglrx(0): ********************************************* *
>
> So I guess I need to find and install the DRI module? Is this just a 
> simple matter of installing an RPM package or is it more complex than 
> that?
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>
Ah whoops, I wasn't reading. Is there any way to get around this without 
having to recompile my kernel? I've only done that once before and I 
killed a week in the process.


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