Messages in this thread | | | From | Bjorn Helgaas <> | Subject | Re: 2.6.22-rc: regression: no irda0 interface (2.6.21 was OK), smsc does not find chip | Date | Thu, 7 Jun 2007 12:34:47 -0600 |
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On Wednesday 06 June 2007 02:45:01 pm Andrey Borzenkov wrote: > I am beginning to doubt whether drier > works on my system at all (i.e. before PnP change); have to find time to > test.
In 2.6.21, smsc-ircc2 at least found the device. So we definitely have a problem because in 2.6.22-rc, we don't find the device.
What laptop do you have? Maybe I can find one to play with.
I think Windows always calls _SRS, even if it doesn't need to change the current resource settings. Linux doesn't do that, and my HP nw8240 firmware has a bug that leaves the IR device partly-enabled until _SRS is called. Maybe yours has a similar bug.
Can you set CONFIG_ACPI_DEBUG=y, make it so smsc-ircc2 isn't loaded automatically, and try this (along with my previous patch to swap FIR and SIR):
# dmesg -n 8 # echo 0x200 > /sys/module/acpi/parameters/debug_level # echo disable > /sys/bus/pnp/devices/00:0a/resources # echo activate > /sys/bus/pnp/devices/00:0a/resources # modprobe smsc-ircc2
If you try this, can you collect the whole dmesg log?
It's also possible that some other driver like i2c is messing with the ISA/LPC bridge configuration and breaking the IR device config. Your lspnp output doesn't show any other ISA devices down there, but I know i2c likes to poke around and discover things that kinda, sorta work, but the BIOS didn't expose.
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