[mythtv-users] setpci question

Brian Walter blwalter at gmail.com
Fri Apr 27 14:04:56 UTC 2007


Henrik Beckman wrote:
> Just out of curiosity, why do you want to set it ?
> My guess is that its a hard value that canīt be changed.
>
> /Henrik
>
> On 4/27/07, *Brian Walter* < blwalter at gmail.com 
> <mailto:blwalter at gmail.com>> wrote:
>
>     Greetings,
>     I'm attempting to change the pci latency for my SATA
>     controller.  Based
>     on information I found from various sources, the following *should*
>     work.  However, when I do the setpci, the latency remains
>     unchanged.  Am
>     I missing something?
>
>
>     lspci -v
>     <snip>
>     00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller
>     (rev a2)
>     (prog-if 85 [Master SecO PriO])
>            Subsystem: ASUSTeK Computer Inc. Unknown device 8239
>            Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 10
>            I/O ports at 09f0 [size=8]
>            I/O ports at 0bf0 [size=4]
>            I/O ports at 0970 [size=8]
>            I/O ports at 0b70 [size=4]
>            I/O ports at dc00 [size=16]
>            Memory at fe02d000 (32-bit, non-prefetchable) [size=4K]
>            Capabilities: [44] Power Management version 2
>            Capabilities: [b0] Message Signalled Interrupts: 64bit+
>     Queue=0/2
>     Enable-
>            Capabilities: [cc] HyperTransport: MSI Mapping
>
>     <snip>
>
>     [root at mythtvserver1 ~]# setpci -v -s 00:05.0 latency_timer=ff
>     00:05.0:0d ff
>
>     lspci -v
>
>     <snip>
>     00:05.0 IDE interface: nVidia Corporation MCP55 SATA Controller
>     (rev a2)
>     (prog-if 85 [Master SecO PriO])
>            Subsystem: ASUSTeK Computer Inc. Unknown device 8239
>            Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 10
>            I/O ports at 09f0 [size=8]
>            I/O ports at 0bf0 [size=4]
>            I/O ports at 0970 [size=8]
>            I/O ports at 0b70 [size=4]
>            I/O ports at dc00 [size=16]
>            Memory at fe02d000 (32-bit, non-prefetchable) [size=4K]
>            Capabilities: [44] Power Management version 2
>            Capabilities: [b0] Message Signalled Interrupts: 64bit+
>     Queue=0/2
>     Enable-
>            Capabilities: [cc] HyperTransport: MSI Mapping
>
>
>     Is this just a function of the controller/MB?  Or am I missing
>     something
>     obvious?
>
>     The motherboard is Asus M2N-SLI deluxe.
>
>     TIA
>     Brian
>
Forgot the link:
http://www.mythtv.org/wiki/index.php/PCI_Latency



More information about the mythtv-users mailing list