Hi, I'm seeing the kernel occasionally lock up when I put the system into low power mode and then wake it up. The lock up occurs while the system is trying to resume from low power mode. What happens is that cfg80211 will sometimes kick off a process to update CRDA information. It prints the mesage "cfg80211: Calling CRDA for country: US". When it does this, call_crda in reg.c calls kobject_uevent_env to notify the system that CRDA information has changed. This eventually causes the system to try to run /sbin/mdev. That is where the lock up occurs. I'm running on a development system where I'm using NFS over Ethernet to access the root file system. When the system resumes from low power mode, the Ethernet PHY driver renegotiates the Ethernet links. This takes a couple seconds. If cfg80211 attempts to run /sbin/mdev before the Ethernet links are up, then the system won't be able to access /sbin/mdev over NFS and this will cause a lock up. I'm using the very latest Atheros ath6kl Wi-Fi driver. It is built using compat-wireless which includes the cfg80211 code. Is this a known problem? Can you recommend a solution for it? ---- Charles -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
