On Wed, Jun 1, 2011 at 12:24 AM, Carl Karsten <carl@xxxxxxxxxxxxxxxxx> wrote: > I wrote this to see when the kernel was reacting to cards being > plugged and unplugged. > > SUBSYSTEM=="pci", ACTION=="add", RUN+="/usr/bin/sox -n -d synth .1 sin 700" > SUBSYSTEM=="pci", ACTION=="remove", RUN+="/usr/bin/sox -n -d synth .1 sin 500" > SUBSYSTEM=="firewire", ACTION=="remove", RUN+="/usr/bin/sox -n -d > synth .1 sin 500" > > plugged in works fine - seems instant. > > unplugging seems to be around 2 seconds for the first beep and 10 > seconds for the 2nd. the gap between 1st and 2nd can be seen: > > juser@pc9e:~$ udevadm monitor > monitor will print the received events for: > UDEV - the event which udev sends out after rule processing > KERNEL - the kernel uevent > > KERNEL[1306905305.865025] add > /devices/pci0000:00/0000:00:1c.2/0000:04:00.0 (pci) > UDEV [1306905306.035403] add > /devices/pci0000:00/0000:00:1c.2/0000:04:00.0 (pci) > KERNEL[1306905306.424395] add > /devices/pci0000:00/0000:00:1c.2/0000:04:00.0/fw1 (firewire) > UDEV [1306905306.425754] add > /devices/pci0000:00/0000:00:1c.2/0000:04:00.0/fw1 (firewire) > > KERNEL[1306905309.874340] remove > /devices/pci0000:00/0000:00:1c.2/0000:04:00.0/fw1 (firewire) > UDEV [1306905309.875007] remove > /devices/pci0000:00/0000:00:1c.2/0000:04:00.0/fw1 (firewire) > > KERNEL[1306905319.874299] remove > /devices/pci0000:00/0000:00:1c.2/0000:04:00.0 (pci) > UDEV [1306905320.055101] remove > /devices/pci0000:00/0000:00:1c.2/0000:04:00.0 (pci) > > > I don't know if this is causing a problem, but I suspect it is. > I know I have often unplugged one card and plugged in another within > the 10 second window. I assumed the drivers would have been unloaded > by then. Now that I have the beeps I know how long to wait. > I just noticed that the 3 times show up in syslog: Jun 3 13:38:34 pc9e kernel: [219981.609750] pciehp 0000:00:1c.2:pcie04: Card not present on Slot(2) Jun 3 13:38:36 pc9e kernel: [219983.600274] firewire_ohci: failed to write phy reg Jun 3 13:38:46 pc9e kernel: [219993.620351] firewire_ohci 0000:04:00.0: PCI INT A disabled Jun 3 13:38:46 pc9e kernel: [219993.620360] firewire_ohci: Removed fw-ohci device. What can be done to remove or reduce the delay? Also, it does not have this delay with a PC card. -- Carl K -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
