diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-12-12 00:05:53 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-06 14:13:49 -0800 |
| commit | 5cb6d2895e510f77514ef15c8f061621f09e4d78 (patch) | |
| tree | 73b09bafbaf76169b04239b37860a88bf54b663d /drivers/input | |
| parent | 43579d76bdd733c9baf131bbc29719c2a2821569 (diff) | |
| download | lwn-5cb6d2895e510f77514ef15c8f061621f09e4d78.tar.gz lwn-5cb6d2895e510f77514ef15c8f061621f09e4d78.zip | |
Input: synaptics - fix touchpad not working after S2R on Vostro V13
commit 8521478f67e95ada4e87970c7b41e504c724b2cf upstream.
Synaptics touchpads on several Dell laptops, particularly Vostro V13
systems, may not respond properly to PS/2 commands and queries immediately
after resuming from suspend to RAM. This leads to unresponsive touchpad
after suspend/resume cycle.
Adding a 1-second delay after resetting the device allows touchpad to
finish initializing (calibrating?) and start reacting properly.
Reported-by: Daniel Manrique <daniel.manrique@canonical.com>
Tested-by: Daniel Manrique <daniel.manrique@canonical.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/mouse/synaptics.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index e06e045bf907..6ad728f0e287 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -24,6 +24,7 @@ */ #include <linux/module.h> +#include <linux/delay.h> #include <linux/dmi.h> #include <linux/input/mt.h> #include <linux/serio.h> @@ -760,6 +761,16 @@ static int synaptics_reconnect(struct psmouse *psmouse) do { psmouse_reset(psmouse); + if (retry) { + /* + * On some boxes, right after resuming, the touchpad + * needs some time to finish initializing (I assume + * it needs time to calibrate) and start responding + * to Synaptics-specific queries, so let's wait a + * bit. + */ + ssleep(1); + } error = synaptics_detect(psmouse, 0); } while (error && ++retry < 3); |