From: Eric Miao Date: Tue, 4 Jun 2013 16:30:55 +0000 (-0700) Subject: Input: synaptics - fix sync lost after resume on some laptops X-Git-Tag: v3.10-rc5~27^2~1 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eeb065582a9618c1cf5b7154df7bae06aeb44636;p=pandora-kernel.git Input: synaptics - fix sync lost after resume on some laptops In summary, the symptom is intermittent key events lost after resume on some machines with synaptics touchpad (seems this is synaptics _only_), and key events loss is due to serio port reconnect after psmouse sync lost. Removing psmouse and inserting it back during the suspend/resume process is able to work around the issue, so the difference between psmouse_connect() and psmouse_reconnect() is the key to the root cause of this problem. After comparing the two different paths, synaptics driver has its own implementation of synaptics_reconnect(), and the missing psmouse_probe() seems significant, the patch below added psmouse_probe() to the reconnect process, and has been verified many times that the issue could not be reliably reproduced. There are two PS/2 commands in psmouse_probe(): 1. PSMOUSE_CMD_GETID 2. PSMOUSE_CMD_RESET_DIS Only the PSMOUSE_CMD_GETID seems to be significant. The PSMOUSE_CMD_RESET_DIS is irrelevant to this issue after trying several times. So we have only implemented this patch to issue the PSMOUSE_CMD_GETID so far. Tested-by: Daniel Manrique Signed-off-by: James M Leddy Signed-off-by: Dmitry Torokhov --- Reading git-diff-tree failed