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| author | Akio Idehara <zbe64533@gmail.com> | 2012-02-24 00:33:22 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-02-24 00:46:45 -0800 |
| commit | 99c90ab31fad855b9da9dee3a5aa6c27f263e9d6 (patch) | |
| tree | c282083ac7a0aff9105e0bc2df5ced725c8902b6 /Documentation/input | |
| parent | 82b982c9a697e7be0745523a53334fe38a4582c8 (diff) | |
| download | lwn-99c90ab31fad855b9da9dee3a5aa6c27f263e9d6.tar.gz lwn-99c90ab31fad855b9da9dee3a5aa6c27f263e9d6.zip | |
Input: ALPS - fix touchpad detection when buttons are pressed
ALPS touchpad detection fails if some buttons of ALPS are pressed.
The reason is that the "E6" query response byte is different from
what is expected.
This was tested on a Toshiba Portege R500.
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Akio Idehara <zbe64533@gmail.com>
Tested-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'Documentation/input')
| -rw-r--r-- | Documentation/input/alps.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/input/alps.txt b/Documentation/input/alps.txt index f274c28b5103..2f95308251d4 100644 --- a/Documentation/input/alps.txt +++ b/Documentation/input/alps.txt @@ -13,7 +13,8 @@ Detection All ALPS touchpads should respond to the "E6 report" command sequence: E8-E6-E6-E6-E9. An ALPS touchpad should respond with either 00-00-0A or -00-00-64. +00-00-64 if no buttons are pressed. The bits 0-2 of the first byte will be 1s +if some buttons are pressed. If the E6 report is successful, the touchpad model is identified using the "E7 report" sequence: E8-E7-E7-E7-E9. The response is the model signature and is |