I have Compaq CQ61-420US (64-bit AMD) laptop with Synaptics touchpad checked using

$ egrep -i 'synap' /proc/bus/input/devices
N: Name="SynPS/2 Synaptics TouchPad"

But recently after Arch Linux 3.15-1 stock kernel, I have a lot of these messages in my dmesg accompanied with mouse freezes:

[    7.064589] psmouse serio1: synaptics: Touchpad model: 1, fw: 6.5, id: 0x1c0b1, caps: 0xa04751/0xa00000/0x0, board id: 3655, fw id: 428212
[11981.973831] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
[11981.975792] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
[11981.977503] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
[11981.986308] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
[11981.988072] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
[11981.988084] psmouse serio1: issuing reconnect request

And after I remove and reinstall psmouse through modprobe as mentioned here on the Arch Linux Wiki

# modprobe -r psmouse ; modprobe psmouse

I get in dmesg:

[12012.349197] psmouse serio1: synaptics: Touchpad model: 1, fw: 6.5, id: 0x1c0b1, caps: 0xa04751/0xa00000/0x0, board id: 3655, fw id: 428212`

Even though the mouse starts working, but even a short amount of inactivity it gets disabled, and I have this every now and then... sad

Also I downgraded synaptics & evdev to previous versions as of now. I also tried using:

# modprobe -r psmouse
# modprobe psmouse proto=imps
# sudo modprobe psmouse proto=bare

but none of them work!

I also tried changing the CPU governor to USERSPACE which was originally PERFORMANCE, no luck even then.

P.S: I also posted my problem on ArchLinux Forums.

  • You're definitely not alone! I'm on Lubuntu 14.04.1 here and lo and behold, I'm not on a notebook but on a desktop PC! Well, I think this must have gotten introduced with the 14.04->14.04.1 update. It's extremely annoying and a pointless (though typical) answer like "use an usb mouse" won't help me much, since I have an older machine and I do need my USB ports! I don't want to occupy it with a mouse if I don't absolutely have to. – syntaxerror Aug 1 '14 at 0:41
  • @syntaxerror Check my ArchLinux thread(mentioned in post) there a kinda all the possible workarounds present in it maybe some might help you!! – ArchKudo Aug 1 '14 at 9:07
  • yes, thanks, checked this out already. However, there is still no information about the actual cause of this. If this doesn't stop, we'll have to inform the guys from LKML eventually. This is absolutely unbearable for daily work. – syntaxerror Aug 7 '14 at 8:48
  • @syntaxerror The problem is I really don't know whether it is a synaptics driver problem or a psmouse problem and if did post it on LKML without contacting the driver author first, they did burn me!! Thanks though!! – ArchKudo Aug 9 '14 at 12:49

Did you try the following boot parameters?

i8042.reset i8042.nomux=1 psmouse.proto=imps

Had a similar problem on my laptop and the problem went away with those parameters.

  • Oh, This problem was solved after Linux 3.17.x (eventhough problem exist in 3.16 LTS), and also imps kills all trackpad functionality(there is scrolling available though), however in power-save and conservative governors the problem persists!! Thanks for replying though! – ArchKudo Dec 13 '14 at 17:45

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