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    SubjectRe: 2.6.36/2.6.37: broken compatibility with userspace input-utils ?
    On 11-01-24 11:37 PM, Mark Lord wrote:
    > On 11-01-24 11:20 PM, Dmitry Torokhov wrote:
    >> On Mon, Jan 24, 2011 at 11:13:05PM -0500, Mark Lord wrote:
    >>> On 11-01-24 07:55 PM, Dmitry Torokhov wrote:
    >>>>
    >>>> No, as far as I know we kept ABI intact.
    >>>
    >>>
    >>> Okay, I hacked lsinput and input-kbd to ignore the protocol number.
    >>> input-kbd is still broken: it thinks my remote control (Hauppauge)
    >>> has only ten buttons, and won't allow me to remap codes larger than 10.
    >>>
    >>> I've now hacked around that too, but without determining exactly
    >>> where the interface got broken.
    >>>
    >>> Ugh.
    >>>
    >>
    >> Where are the sources? I can take a look...
    >
    > I used "apt-get source input-utils" under Ubuntu-10.10.
    > The problem seems to be here somewhere:
    >
    > static struct kbd_map* kbd_map_read(int fd)
    > {
    > struct kbd_entry entry;
    > struct kbd_map *map;
    > int rc;
    >
    > map = malloc(sizeof(*map));
    > memset(map,0,sizeof(*map));
    > for (map->size = 0; map->size < 65536; map->size++) {
    > entry.scancode = map->size;
    > entry.keycode = KEY_RESERVED;
    > rc = ioctl(fd, EVIOCGKEYCODE, &entry);
    > if (rc < 0) {
    > break;
    ...
    > }
    >
    > This results in (map->size==10) for 2.6.36+ (wrong),
    > and a much larger map->size for 2.6.35 and earlier.
    >
    > So perhaps EVIOCGKEYCODE has changed?

    I hacked input-kbd to ignore the map->size calculated above
    when writing a new map.. seems to work. Weird that the old
    method stopped working with 2.6.36, though.

    I'm using this with ir-kbd-i2c.c as the hardware driver
    for the hauppauge R/C interface on a PVR-250 card.

    Hey.. perhaps you may also know where in the code this thing
    is being forced to a repeat rate of about 4 times/sec max?
    I'd like the remote to be slightly faster that this,
    but my 2.5.35 (and earlier) hacks to ir-kbd-i2c now don't
    work for repeat intervals less than approx 220msecs.

    Cheers!


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