Red Hat Bugzilla – Bug 474584
zd1211 has broken sysfs 'driver' link
Last modified: 2008-12-29 07:59:10 EST
Description of problem: Since day before yesterday (I suppose after yum update & reboot) NetworkManager does not detect my wireless device anymore. This line is showing in /var/log/messages: Dec 4 16:26:37 localhost NetworkManager: nm_device_wifi_new: assertion `driver != NULL' failed On Dec 2, everything was working fine: Dec 2 16:48:53 localhost NetworkManager: <info> wlan0: driver is 'zd1211rw'. Version-Release number of selected component (if applicable): NetworkManager-0.7.0-0.12.svn4326.fc10.x86_64 How reproducible: Always Steps to Reproduce: Simply boot the system. Actual results: NetworkManager can't detect/connect the device. Expected results: NetworkManager detects/connects Additional info: Wireless device(lsusb): Bus 001 Device 004: ID 0ace:1215 ZyDAS WLA-54L WiFi Kernel driver: zd1211rw
This seems to be caused by HAL somehow, there is no info.linux.driver property for the device: [jura@eriador src]$ hal-device /org/freedesktop/Hal/devices/net_00_11_3b_04_b4_25 udi = '/org/freedesktop/Hal/devices/net_00_11_3b_04_b4_25' info.capabilities = { 'net', 'net.80211' } (string list) net.80211.mac_address = 74004608037 (0x113b04b425) (uint64) info.subsystem = 'net' (string) info.product = 'WLAN Interface' (string) net.physical_device = '/org/freedesktop/Hal/devices/usb_device_ace_1215_noserial_if0' (string) info.udi = '/org/freedesktop/Hal/devices/net_00_11_3b_04_b4_25' (string) net.originating_device = '/org/freedesktop/Hal/devices/usb_device_ace_1215_noserial_if0' (string) linux.sysfs_path = '/sys/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0/net/wlan0' (string) info.parent = '/org/freedesktop/Hal/devices/usb_device_ace_1215_noserial_if0' (string) net.interface = 'wlan0' (string) net.address = '00:11:3b:04:b4:25' (string) net.linux.ifindex = 3 (0x3) (int) linux.hotplug_type = 2 (0x2) (int) info.category = 'net.80211' (string) net.arp_proto_hw_id = 1 (0x1) (int) linux.subsystem = 'net' (string)
Hm, manually setting the property doesn't help. It still bails with the failed assertion.
What exact kernel version and hal version do you have? What's the output of: ls -al /sys/class/net/wlan0/device/driver it should look something like: lrwxrwxrwx 1 root root 0 2008-12-09 12:13 /sys/class/net/eth2/device/driver -> ../../../../bus/pci/drivers/ipw2200
[jura@eriador ~]$ rpm -q kernel kernel-2.6.27.5-117.fc10.x86_64 [jura@eriador ~]$ rpm -q hal hal-0.5.12-12.20081027git.fc10.x86_64 [jura@eriador ~]$ ls -al /sys/class/net/wlan0/device/driver lrwxrwxrwx 1 root root 0 2008-12-09 16:40 /sys/class/net/wlan0/device/driver -> ../../../../../../bus/usb/drivers/zd1211rw But the link is broken... [jura@eriador ~]$ ls -l /sys/bus/usb/drivers total 0 dr-xr-xr-x 2 root root 0 2008-12-09 17:40 001 dr-xr-xr-x 2 root root 0 2008-12-09 17:40 002 -r--r--r-- 1 root root 0 2008-12-09 16:40 devices I'm updating to kernel-2.6.27.7-134.fc10.x86_64, will let you know how it goes.
Nope, no change with latest kernel.
Ok, it's a kernel bug then; if that link doesn't work, HAL can't get the driver name, and thus NM can't get the driver name either.
Can you replicate this with a current rawhide kernel?
Yep, reproducible with 2.6.28-0.129.rc8.git2.fc11.x86_64
Oddly enough, it works with the same kernel (2.6.27.5-117.fc10.x86_64) on the live cd, but not on my machine. I think I'll just reinstall.
OK, I figured it out. I had this line in fstab (because of VirtualBox), which overwrote the directory: none on /sys/bus/usb/drivers type usbfs (rw,devgid=501,devmode=664)