[LAU] USB on ThinkPad T520

[plutek]

From: Clemens Ladisch <clemens at ladisch.de>
Date: Sat, 12 May 2012 20:30:29 +0200

> plutek wrote:
>> i've been running AVLinux5.0.3 on a ThinkPad T61p for a while now....
>> with an ART USB Dual Tube Pre, i can run Jack at 64 frames, 2 periods
>>
>> now i've got a new ThinkPad T520, and if i start jack on USB at 64*2
>> i get hundreds of xruns in seconds.
> 
> Both machines run (I assume) the same software?  Then the problem is
> with the hardware, or its drivers.
> 
> Please show the output of lspci and the contents of /proc/interrupts.

alright, here they are:

root at palnote:/home/plutek# lspci
00:00.0 Host bridge: Intel Corporation Sandy Bridge DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Sandy Bridge Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation Cougar Point HECI Controller #1 (rev 04)
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation Cougar Point High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 1 (rev b4)
00:1c.1 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 2 (rev b4)
00:1c.3 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 4 (rev b4)
00:1c.4 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 5 (rev b4)
00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Cougar Point LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation Cougar Point 6 port SATA AHCI Controller (rev 04)
00:1f.3 SMBus: Intel Corporation Cougar Point SMBus Controller (rev 04)
03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01)
0d:00.0 System peripheral: Ricoh Co Ltd Device e823 (rev 08)
0d:00.3 FireWire (IEEE 1394): Ricoh Co Ltd FireWire Host Controller (rev 04)
root at palnote:/home/plutek# cat /proc/interrupts 
           CPU0       CPU1       CPU2       CPU3       
  0:        243          0          0          0   IO-APIC-edge      timer
  1:       1511          0          0          0   IO-APIC-edge      i8042
  8:          1          0          0          0   IO-APIC-edge      rtc0
  9:      28481          0          0          0   IO-APIC-fasteoi   acpi
 12:      15976          0          0          0   IO-APIC-edge      i8042
 16:      18305          0          0          0   IO-APIC-fasteoi   mmc0, ehci_hcd:usb1, mei
 23:   60179021          0          0          0   IO-APIC-fasteoi   ehci_hcd:usb2
 40:       2989          0          0          0   PCI-MSI-edge    
 41:        573          0          0          0   PCI-MSI-edge      firewire_ohci
 42:       9506          0          0          0   PCI-MSI-edge      ahci
 43:     311111          0          0          0   PCI-MSI-edge      i915
NMI:          0          0          0          0   Non-maskable interrupts
LOC:    1193738    4643806    1633507    1673425   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:          0          0          0          0   Performance monitoring interrupts
IWI:          0          0          0          0   IRQ work interrupts
RES:    9862796   73470954   19362597   18060482   Rescheduling interrupts
CAL:      21749       5487      20141      22523   Function call interrupts
TLB:        258        357        304        486   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
MCE:          0          0          0          0   Machine check exceptions
MCP:        123        123        123        123   Machine check polls
ERR:          0
MIS:          0


thanks much.... cheers!
.pltk.