lkml.org 
[lkml]   [2009]   [Aug]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: serio / atkbd / PS/2 Strangeness with Serial port adapter
    Date
    On Monday 24 August 2009 17:09:20 Matt Causey wrote:
    > On Mon, Aug 10, 2009 at 1:34 AM, Dmitry
    > Torokhov<dmitry.torokhov@gmail.com> wrote:
    >
    > >> [ 459.004227] drivers/input/serio/i8042.c: fe <- i8042 (interrupt, 1,
    > >> 12, timeout) [445118]
    > >> [20171.684870] drivers/input/serio/i8042.c: 0b <- i8042 (interrupt, 0,
    > >> 1) [20162195]
    > >>
    > >> However - the atkbd driver does not pick the device up at all.
    > >>
    > >
    > > Your device is steadely refusing to say that it is a keyboard - and so
    > > atkbd driver does not bind to it.
    > >
    > >> So, I did find a workaround (which is NOT acceptable for this
    > >> deployment). Remember the PS/2 'wedge' I mentioned? Well, it has an
    > >> extra PS/2 port for your keyboard. If I connect a PS/2 keyboard to
    > >> that thing, suddenly my scanner starts working.
    > >>
    > >> We see some chatter from the controller driver, then one of these:
    > >>
    > >> [23811.805578] input: AT Translated Set 2 keyboard as
    > >> /devices/platform/i8042/serio0/input/input6
    > >>
    > >
    > > That happened because apparently the 'wedge' passes the inquirys to
    > > the real keyboard and it answers propery.
    > >
    > > I think the "i8042.dumbkbd" kernel parameter will solve your issue.
    > >
    > > --
    > > Dmitry
    > >
    >
    > That's great. I think it's the only option that I did not try. ;-)
    > Works great!
    >
    > In case it matters:
    >
    > blah blah/ # dmesg | grep i8042
    > [ 0.000000] Kernel command line: initrd=ramdisk.gz
    > video="vesafb:mtrr,ywrap,1024x768-32@85" i8042.dumbkbd
    > BOOT_IMAGE=bzImage auto
    > [ 14.046511] serio: i8042 KBD port at 0x60,0x64 irq 1
    > [ 14.046578] serio: i8042 AUX port at 0x60,0x64 irq 12
    > [ 15.804210] input: AT Translated Set 2 keyboard as
    > /devices/platform/i8042/serio0/input/input2
    > blah blah/ #
    >
    > Looks like it just decides that there must be a keyboard there,
    > whether or not there really is one.
    >
    > Are there any downsides to using this kernel parameter?
    >

    The kernel will not control LEDs on the keyboard nor will it be able
    to control hardware autorepeat parameters (software autorepeat should
    still work fine).

    --
    Dmitry


    \
     
     \ /
      Last update: 2009-08-25 02:25    [W:0.029 / U:0.808 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site