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

Brad Fuller bradallenfuller at yahoo.com
Fri May 6 05:31:09 UTC 2005



Matt Merkey wrote:

> Brad Fuller wrote:
>
>>
>>
>> Matt Merkey wrote:
>>
>>> 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.
>>>>>
>>>>> _______________________________________________
>>>>> mythtv-users mailing list
>>>>> mythtv-users at mythtv.org
>>>>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>>>
>>>> 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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>>>> mythtv-users at mythtv.org
>>>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>>>
>>> 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.
>>
>>
>>
>> If you are using nvidia drivers, you used to have to comment out the 
>> dri line in your xorg.conf file. I haven't installed the newer 
>> drivers, so maybe you don't have to do that anymore. But, you might 
>> check.
>>
>> brad
>> _______________________________________________
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>> mythtv-users at mythtv.org
>> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>>
> Ah, something to try. I'm also going to try rolling back to the 2.6.10 
> kernel. From what I've been reading, there are quite a few issues with 
> the 2.6.11 kernel and ATI's drivers.

Oh.. I didn't know you had an ATI. Well.. don't know if it applies or not.


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