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SubjectRe: bug: acpi ata_bay dock reminds undocked
Date
On Tuesday, April 29, 2014 10:16:41 PM Pali Rohár wrote:
> Hello,

Hi,

> I have problem with sysfs entry docked
>
> /sys/bus/platform/devices/dock.0/docked
>
> for my media bay DVD drive on notebook Dell Latitude E6440.
>
> After booting linux kernel docked is set to 1 (which is correct,
> DVD hw is inserted into sata dock). When I undock it via sysfs
> entry
>
> /sys/bus/platform/devices/dock.0/undock
>
> then kernel remove DVD device from system (no /dev/sr0 anymore)
> and docked sysfs entry is set to 0.
>
> When I press eject button on DVD drive, I hear some spin up and
> kernel detect DVD device again (also udev create /dev/sr0). But
> docked sysfs entry remains set to 0. It will never be set back to
> 1 - only after reboot.
>
> So this looks like bug somewhere and probably in linux acpi dock
> driver... Do you know to solve this problem? More applications
> checking docked sysfs entry for dock presence and returning 0
> will mislead them.
>
> Here is some info from sysfs about dock:
>
> $ grep "" /sys/bus/platform/devices/dock.0/*
> /sys/bus/platform/devices/dock.0/docked:0
> /sys/bus/platform/devices/dock.0/flags:32
> /sys/bus/platform/devices/dock.0/modalias:acpi:LNXIOBAY:
> /sys/bus/platform/devices/dock.0/type:ata_bay
> /sys/bus/platform/devices/dock.0/uevent:MODALIAS=acpi:LNXIOBAY:
>
> If you need some more info let me know. I would be happy to have
> working docked sysfs entry.

Which kernel version(s) have you tried?


--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.[unhandled content-type:application/pgp-signature]
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