Messages in this thread | | | Date | Wed, 7 Oct 2009 22:31:21 +0200 | From | Michael Guntsche <> | Subject | Re: [BUG] No ttyS0 - Strange udev 8250_pnp interaction |
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On 2009.10.07 22:12:28 , Kay Sievers wrote: > To be more specific, Michael, can you please run "udevadm monitor" at > the same time you see this happen?
I started udevadm monitor with the module installed AND all 4 devices populated. Then I removed the module....
KERNEL[1254947142.220060] remove /devices/pnp0/00:06/tty/ttyS1 (tty) UDEV [1254947142.220121] add /devices/platform/serial8250/tty/ttyS1 (tty) KERNEL[1254947142.220161] add /devices/platform/serial8250/tty/ttyS1 (tty) UDEV [1254947142.220857] remove /devices/pnp0/00:06/tty/ttyS1 (tty) KERNEL[1254947142.223078] remove /devices/pnp0/00:05/tty/ttyS0 (tty) UDEV [1254947142.223134] add /devices/platform/serial8250/tty/ttyS0 (tty) KERNEL[1254947142.223175] add /devices/platform/serial8250/tty/ttyS0 (tty) UDEV [1254947142.223800] remove /devices/pnp0/00:05/tty/ttyS0 (tty) KERNEL[1254947142.225369] remove /bus/pnp/drivers/serial (drivers) UDEV [1254947142.225419] remove /module/8250_pnp (module) KERNEL[1254947142.225455] remove /module/8250_pnp (module) UDEV [1254947142.225675] remove /bus/pnp/drivers/serial (drivers)
Afterwards ONLY ttyS2 and ttS3 were under /dev.
I then added the module again ....
KERNEL[1254947157.330470] add /module/8250_pnp (module) UDEV [1254947157.330521] add /module/8250_pnp (module) KERNEL[1254947157.333498] remove /devices/platform/serial8250/tty/ttyS0 (tty) KERNEL[1254947157.333550] add /devices/pnp0/00:05/tty/ttyS0 (tty) UDEV [1254947157.334830] add /devices/pnp0/00:05/tty/ttyS0 (tty) UDEV [1254947157.334889] remove /devices/platform/serial8250/tty/ttyS0 (tty) KERNEL[1254947157.338967] remove /devices/platform/serial8250/tty/ttyS1 (tty) KERNEL[1254947157.339020] add /devices/pnp0/00:06/tty/ttyS1 (tty) KERNEL[1254947157.339056] add /bus/pnp/drivers/serial (drivers) UDEV [1254947157.340180] remove /devices/platform/serial8250/tty/ttyS1 (tty) UDEV [1254947157.340753] add /devices/pnp0/00:06/tty/ttyS1 (tty) UDEV [1254947157.341202] add /bus/pnp/drivers/serial (drivers)
ONLY ttyS1 (and S2, S3) where there.
Kind regards, Michael
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