Hi On 08.04.2015 20:45, Rodrigo Severo wrote: > Hi, > > > When connecting cx231xx video grab devices (which are USB 2.0 > themselves) on ASMedia ASM1042A USB 3.0 Host Controllers the video > capture process hangs after a few minutes. Besides hanging my log is > flowed with the following warning: Does this only happend with the ASMedia ASM1042A xHCI controller? Can you reproduce it with a xHCI controller from another vendor? > > xhci_hcd 0000:05:00.0: WARN Successful completion on short TX: needs > XHCI_TRUST_TX_LENGTH quirk? > > I believe it's important to notice that the same capture device on the > same motherboard but on a different USB host (the USB controller: > Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 USB EHCI > Controller) runs smoothly for months (I'm using it to record real time > video continuously). > > I tested this several months ago with the same results but didn't have > the time to pursue a final proper fix. > > At that time I even tested enabling XHCI_TRUST_TX_LENGTH quirk for the > ASM1042A USB 3.0 Host Controller which eliminated the warnings on my > logs but didn't solve the hang issues. Can you add xhci debugging and post the output before the hang. Enable xhci debugging with: echo -n 'module xhci_hcd =p' > /sys/kernel/debug/dynamic_debug/control -Mathias -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
