This thread seems to be going nowhere. I perused the archive, I see no evidence of progress.
My advice: 1) Safe boot with Shift key at startup. Then reinstall the 10.4.11 PPC Combo Update. 2) Upon reboot hold (Cmd-v) keys for verbose dialog at startup. Hit Shutdown, and see what happens. It may be fixed, and shutdown normally. If not, you can see where the stall is. 3) If it's a USB card problem, look in System Profiler for the exact model of your card, you'll be looking for the VID (Vendor ID #) and DID (Device ID #), as well as the "Firmware revision". I've not encountered too many USB PCI cards needing firmware update, but I have encounter many external USB enclosures, including ones with NEC chipsets, that either didn't work on Mac, or worked very poorly, which were greatly improved by updating the firmware. Often finding such firmware is nearly impossible, most hardware this old has zero support, and websites shutdown, the Internet Archive>Wayback Machine is often the only hope. If you have the VID & DID and chipset, or model #, you might find others with PPC Macs with similar issues? Often stalled shutdowns are network issues, perhaps you connected to another Mac or server in the past, and now it's waiting for some acknowledgement of a disconnect that's never coming. Hopefully a simple Safe Boot or reinstall of the Combo Update would solve this, but seeing the verbose dialog would surely be best. -- -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list --- You received this message because you are subscribed to the Google Groups "G-Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to g3-5-list+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.