RHEL AS 4-U3 and U4 – USB Functionality Might Be Lost When Running Red Hat Linux

When the system is running Red Hat Enterprise Linux Advanced Server 4 Update 3 or Update 4 (RHEL AS 4-U3/U4) and is booting, the OHCI root hub might end up in a bad state. This is an intermittent problem. Typically, you can detect this problem because you will lose keyboard and/or mouse functionality. (CR 6463076)

Problem

The root cause of this issue is the same as described in the issue titled “Red Hat Linux Might Hang During Boot If kudzu Is Enabled,” where the OHCI root hub driver ends up in a bad state during booting. Red Hat is aware of this problem and will submit a fix for it.

Workaround

To correct this problem, you must reboot the system.