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.
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