On Sat, 23 Oct 2004, Johannes Berg wrote: > Sometimes, it happened to me that my mouse stopped working: > > Oct 23 15:22:24 johannes kernel: uhci_hcd 0000:00:07.2: host system error, PCI > problems? > Oct 23 15:22:24 johannes kernel: uhci_hcd 0000:00:07.2: host controller halted, very > bad! > > At the same time, probably not coincidentally, my cpu was slowed down: > > Oct 23 15:22:24 johannes kernel: cpufreq: change to 700 MHz succeeded after 1 tries > with result 0 > > Now unplugging the mouse: > > Oct 23 15:22:53 johannes kernel: usb 1-1: USB disconnect, address 4 > > and replugging (same port): > > Oct 23 15:22:56 johannes kernel: usb 1-1: new low speed USB device using address 5 > Oct 23 15:22:56 johannes usb.agent[7347]: usbhid: already loaded > Oct 23 15:22:56 johannes kernel: input: USB HID v1.10 Mouse [Logitech USB-PS/2 > Optical Mouse] on usb-0000:00:07.2-1 > Oct 23 15:22:56 johannes input.agent[7399]: evdev: already loaded > Oct 23 15:22:56 johannes input.agent[7399]: joydev: already loaded > Oct 23 15:22:56 johannes input.agent[7376]: evdev: already loaded > Oct 23 15:22:56 johannes input.agent[7390]: evdev: already loaded > > All continues to work fine, but the device was definitely unavailable > before I unplugged it. > > FWIW, this could well be a hardware bug, but it only occurs sometimes, > not always. I had to load the speedstep-smi modules with the correct > parameters [1] as the detection isn't working, I previously mailed that > to Hiroshi Miura. > > johannes > > [1] speedstep-smi smi_sig=1 smi_cmd=0x82 smi_port=0xb2
I'm rather surprised that it managed to work after you plugged the mouse back in. Anyway, I don't see what can be done about it. The "host system error" means that there was a PCI abort (or something similar) while the USB controller was using the bus. Undoubtedly a hardware problem. Probably it's intermittent because the controller doesn't use the PCI bus all the time. Alan Stern ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
