Hi,
We have a computer acting as a server that locks hard (PS2 keyboard stops responding, prompt never returns, boot gets no further) when USB2 is enabled on FC3 (there were no lockups with FC1). I finally traced this down to being some sort of interaction between udev and USB2. The following steps reproduce the problem:
Boot the kernel with init=/bin/sh mount -n -t proc /proc /proc mount -n -t sysfs /sys /sys /sbin/start_udev /sbin/modprobe uhci-hcd
The machine will hang and not get any further nor will it respond to a ctrl-alt-del or sysrq commands.
modprobing uhci-hcd before starting udev causes the problem to disappear as does disabling USB2 (but leaving USB1 on) in the BIOS. Kernels tested are kernel-2.6.9-1.667 and kernel-2.6.10-1.766_FC3. lspci prints the following USB controller: 00:07.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 16)
Does this sound like a known issue?
Sitsofe Wheeler wrote:
Hi,
We have a computer acting as a server that locks hard (PS2 keyboard stops responding, prompt never returns, boot gets no further) when USB2 is enabled on FC3 (there were no lockups with FC1). I finally traced this down to being some sort of interaction between udev and USB2. The following steps reproduce the problem:
Boot the kernel with init=/bin/sh mount -n -t proc /proc /proc mount -n -t sysfs /sys /sys /sbin/start_udev /sbin/modprobe uhci-hcd
The machine will hang and not get any further nor will it respond to a ctrl-alt-del or sysrq commands.
modprobing uhci-hcd before starting udev causes the problem to disappear as does disabling USB2 (but leaving USB1 on) in the BIOS. Kernels tested are kernel-2.6.9-1.667 and kernel-2.6.10-1.766_FC3. lspci prints the following USB controller: 00:07.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 16)
Does this sound like a known issue?
not to me and the solution is strange... could you add a
set -x
after the first line of start_udev and look, where it hangs?
On Tue, 2005-02-22 at 15:30 +0100, Harald Hoyer wrote:
Sitsofe Wheeler wrote:
We have a computer acting as a server that locks hard (PS2 keyboard stops responding, prompt never returns, boot gets no further) when USB2 is enabled on FC3 (there were no lockups with FC1). I finally traced this down to being some sort of interaction between udev and USB2. The following steps reproduce the problem:
Boot the kernel with init=/bin/sh mount -n -t proc /proc /proc mount -n -t sysfs /sys /sys /sbin/start_udev /sbin/modprobe uhci-hcd Does this sound like a known issue?
not to me and the solution is strange... could you add a
set -x
after the first line of start_udev and look, where it hangs?
I'll set up it up but I don't know when I can get results to you. People were pretty angry at me for taking the server down for one hour to debug the issue ("you have a workaround - isn't that enough?") and that time I had the excuse that a new kernel release had been issued for FC3. If there's anything else I can do at the same time please let me know because I can't take the server down at will...
I've also reported the issue in bugzilla - https://bugzilla.redhat.com/beta/show_bug.cgi?id=149171
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