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bbt5001
n00b
Joined: 21 May 2007
Posts: 22
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 Posted: Wed Feb 27, 2008 7:29 pm Post subject: udev - something's mising |
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I have two systems running Gentoo. One has been kept fairly up-to-date, the other has just been updated for the first time in about a year. There might be some differences in the kernel configuration, but otherwise these are about the same as far as I can tell.
I have three device drivers for which I long ago wrote udev rules and an external script to build and remove the associated /dev entries. I have confirmed that the device drivers, udev rules, and dev-entry scripts are identical on both systems, properly installed and with the correct permissions.
When I load then unload any of these device drivers on the first system all of the corresponding /dev entries are properly created and destroyed.
When I do the same on the second system -- nothing happens.
The entries I expect to see in /proc appear and disappear on both systems. If I run udevtest I see the same things on both systems. For some reason the rules just are not being triggered on this second system.
So I set the log_priority to "debug", then ran "udevmonitor --environment --kernel --udev" on both systems. I then loaded then unloaded the device driver modules. Here's the result on the system that works propely
| Code: |
UEVENT[1204137737.953322] add /module/pci4e (module)
ACTION=add
DEVPATH=/module/pci4e
SUBSYSTEM=module
SEQNUM=1903
UDEV [1204137738.007387] add /module/pci4e (module)
UDEV_LOG=7
ACTION=add
DEVPATH=/module/pci4e
SUBSYSTEM=module
SEQNUM=1903
UDEVD_EVENT=1
UEVENT[1204137781.010623] remove /module/pci4e (module)
ACTION=remove
DEVPATH=/module/pci4e
SUBSYSTEM=module
SEQNUM=1904
UDEV [1204137781.016644] remove /module/pci4e (module)
UDEV_LOG=7
ACTION=remove
DEVPATH=/module/pci4e
SUBSYSTEM=module
SEQNUM=1904
UDEVD_EVENT=1
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Now, for the system that does NOT work, I only get this:
| Code: |
UEVENT[1204137753.766791] add /module/pci4e (module)
ACTION=add
DEVPATH=/module/pci4e
SUBSYSTEM=module
SEQNUM=1548
UEVENT[1204137794.415007] remove /module/pci4e (module)
ACTION=remove
DEVPATH=/module/pci4e
SUBSYSTEM=module
SEQNUM=1549
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So I am getting UEVENT entries on both systems, but no UDEV entries on the second system. What am I missing or perhaps have misconfigured that could cause this problem?
Thanks. |
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sonicbhoc
Veteran
Joined: 24 Oct 2005
Posts: 1805
Location: In front of the computer screen
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| Posted: Thu Feb 28, 2008 3:53 am Post subject: |
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do you have hotplug installed on your second system? I forgot to install it; apparently udev needs a "UEVENT helper" specified in the kernel configs, and I forgot to install mine. Maybe you have the same issue?
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Now using PClinuxOS on my laptop and Gentoo on my desktop and new laptop. |
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bbt5001
n00b
Joined: 21 May 2007
Posts: 22
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| Posted: Thu Feb 28, 2008 3:40 pm Post subject: |
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| Quote: |
do you have hotplug installed on your second system? I forgot to install it; apparently udev needs a "UEVENT helper" specified in the kernel configs, and I forgot to install mine. Maybe you have the same issue?
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This is odd: Both hotplug and hotplug-base are installed on the system that does NOT work; neither of these are installed on the system that DOES work!
Any other suggestions? Meanwhile, I'll keep looking.
By the way, thanks for the phrase "UEVENT helper" -- it's a dandy search string, and has given me a few leads. No resolution yet, though. |
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