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@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