Elric Fu wrote: > 2012/3/26 Martin Mokrejs <mmokrejs@xxxxxxxxxxxxxxxxxx>: >> Elric Fu wrote: >>> 2012/3/26 Martin Mokrejs <mmokrejs@xxxxxxxxxxxxxxxxxx>: >>>> Hi, >>>> I tried one of the "stable" kernels with my Dell Votro 3550 laptop >>>> with a USB2.0 hub connected to its eSATA/USB2.0 port. Is this a known >>>> issue? Aside from removing USB suspend from the kernel, is there any >>>> other way to get rid of this? >>> >>> The kernel is too old. The power management implementation for USB3 >>> was supported from 2.6.37. You should use the lastest kernel. >> >> Ah, thanks. So how about disabling CONFIG_USB_SUSPEND altogether >> for USB3.0 in those old kernels? I mean really to disable it in the xHCI >> driver only. >> >> But the message I reported here is a USB2.0 connection through an >> internal eSATA/USB2.0 connector on the laptop. So are we talking about >> the same? > > Maybe you can write a negative number to /sys/bus/usb/[dev bus name]/ > power/autosuspend. The negative value of autosuspend means disabling > autosuspend. # ls -la /sys/bus/usb/devices/3-0\:1.0/power/ total 0 drwxr-xr-x 2 root root 0 Mar 26 15:24 . drwxr-xr-x 4 root root 0 Mar 26 15:24 .. -rw-r--r-- 1 root root 4096 Mar 26 15:24 wakeup # # ls -la /sys/bus/usb/devices/3-0\:1.0/power/ total 0 drwxr-xr-x 2 root root 0 Mar 26 15:24 . drwxr-xr-x 4 root root 0 Mar 26 15:24 .. -rw-r--r-- 1 root root 4096 Mar 26 15:24 wakeup # find /sys/bus/usb/devices/ -name autosuspend # find /sys/bus/usb/devices/ -name autosuspend # gzip -dc /proc/config.gz | grep SUSPEND CONFIG_ARCH_SUSPEND_POSSIBLE=y CONFIG_SUSPEND=y CONFIG_SUSPEND_FREEZER=y CONFIG_USB_SUSPEND=y # uname -a Linux vostro 2.6.32.59-default #2 SMP Mon Mar 26 01:15:46 MEST 2012 x86_64 Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz GenuineIntel GNU/Linux # echo -n -1 > /sys/bus/usb/devices/3-0\:1.0/power/autosuspend -su: /sys/bus/usb/devices/3-0:1.0/power/autosuspend: No such file or directory # What am I doing wrong? ;) Thanks, Martin -- 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
