[mythtv-users] Video studder XvMC w/OSD

[Roger Heflin]

Mitch Gore wrote:
>> Yes, i also have the fade turned off.  With OSD Fade checked the stutter
>> is so bad its unwatchable.  It would be nice to get ride of it completely.
>> It really ruins the "experience" when you are watching/showing off Myth and
>> it skips a commercial and everyone is like wow thats cool.  Then it stutters
>> and looks like piece of junk.
>>
>> Mitchell
>>
> 
> After some more investigation I noticed that the BOIS is reconizing the CPU
> as P4 3.0 ghz but its clock speed is set to 2Ghz.
> 
> here is some output:
> [myth at mythfe ~]$ cat /proc/cpuinfo
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 15
> model           : 4
> model name      : Intel(R) Pentium(R) 4 CPU 3.00GHz
> stepping        : 1
> cpu MHz         : 1995.506
> cache size      : 1024 KB
> physical id     : 0
> siblings        : 2
> core id         : 0
> cpu cores       : 1
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 5
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov
> pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc pebs
> bts sync_rdtsc pni monitor ds_cpl cid xtpr
> bogomips        : 4008.12
> clflush size    : 64
> 
> processor       : 1
> vendor_id       : GenuineIntel
> cpu family      : 15
> model           : 4
> model name      : Intel(R) Pentium(R) 4 CPU 3.00GHz
> stepping        : 1
> cpu MHz         : 1995.506
> cache size      : 1024 KB
> physical id     : 0
> siblings        : 2
> core id         : 0
> cpu cores       : 1
> fdiv_bug        : no
> hlt_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 5
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov
> pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc pebs
> bts sync_rdtsc pni monitor ds_cpl cid xtpr
> bogomips        : 3974.91
> clflush size    : 64
> 
> 
> Maybe i need to update my BIOS.  Or is there some other thing i can change?
> I looked through BIOS settings but didnt see anything of intrest.
> 
> Mitchell

Updating the bios may be required.

I have seen motherboards that (for an unknown reason) detect the wrong cpu speed.

You can try doing a "load failsafe", save and reboot and see what it does, and 
also a "load optimal" and save and reboot and check it, and also your bios may 
allow you to set a clock multiplier, if so you can calculate what the multiplier 
should be for 3.0 Ghz compared to what it currently is for 2.0Ghz, and set it to 
that.

                               Roger