linux-kernel - Re: udev regression? lsusb silent (no output) since 2.6.22-rc2 at least

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Message-Id: <1180233755.3131.4.camel@lov.localdomain>
Date:	Sun, 27 May 2007 04:42:35 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	bert hubert <bert.hubert@...herlabs.nl>
Cc:	linux-kernel@...r.kernel.org, gregkh@...e.de
Subject: Re: udev regression? lsusb silent (no output) since 2.6.22-rc2 at
	least

On Sat, 2007-05-26 at 22:18 +0200, bert hubert wrote:
> Today I booted 2.6.22-rc2 on Ubunty Edgy Eft, and lsusb died on me:
> 
> ahu@...el:~$ lsusb
> ahu@...el:~$ sudo lsusb
> ahu@...el:~$ 
> 
> This behaviour persists in rc4. This might be udev related. I'm running:
> ii  udev                                   093-0ubuntu18.0edgy2 
> 
> USB does work fine.
> 
> Bit from strace:
> 
> open("/dev/bus/usb", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
> fstat64(3, {st_mode=S_IFDIR|0755, st_size=80, ...}) = 0
> fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
> getdents64(3, /* 4 entries */, 4096)    = 112
> close(3)                                = 0
> open("/dev/bus/usb", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
> fstat64(3, {st_mode=S_IFDIR|0755, st_size=80, ...}) = 0
> fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
> getdents64(3, /* 4 entries */, 4096)    = 112
> getdents64(3, /* 0 entries */, 4096)    = 0
> close(3)                                = 0
> (end of program)
> 
> ahu@...el:~$ ls -l /dev/bus/usb -d
> drwxr-xr-x 3 root root 80 2007-05-26 21:58 /dev/bus/usb
> 
> ahu@...el:~$ ls -l /dev/bus/usb/
> total 0
> lrwxrwxrwx 1 root root 14 2007-05-26 21:58 devices -> .usbfs/devices
> 
> ahu@...el:~$ ls -l /dev/bus/usb/devices 
> lrwxrwxrwx 1 root root 14 2007-05-26 21:58 /dev/bus/usb/devices ->
> .usbfs/devices
> 
> ahu@...el:~$ wc -l /dev/bus/usb/devices
> 95 /dev/bus/usb/devices
> 
> On another machine (debian etch), with an older kernel, where lsusb does
> work:
> 
> open("/dev/bus/usb", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
> fstat64(3, {st_mode=S_IFDIR|0755, st_size=80, ...}) = 0
> fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
> getdents64(3, /* 4 entries */, 4096)    = 96
> close(3)                                = 0 
> open("/dev/bus/usb", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
> fstat64(3, {st_mode=S_IFDIR|0755, st_size=80, ...}) = 0
> fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
> getdents64(3, /* 4 entries */, 4096)    = 96
> getdents64(3, /* 0 entries */, 4096)    = 0 
> close(3)                                = 0 
> open("/dev/bus/usb/001", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
> fstat64(3, {st_mode=S_IFDIR|0755, st_size=60, ...}) = 0
> fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
> getdents64(3, /* 3 entries */, 4096)    = 72
> open("/dev/bus/usb/001/001", O_RDWR)    = -1 EACCES (Permission denied)
> open("/dev/bus/usb/001/001", O_RDONLY)  = 4
> 
> Any clues? Please let me know how I can help solve this problem!

It works fine for me here. Do you have CONFIG_USB_DEVICE_CLASS=y set?

Kay

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