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#1 2016-02-04 17:16:49

freefall
Member
Registered: 2015-12-06
Posts: 5

Touchpad stopped working with the latest update [Kernel 4.4.1-2]

I have an Acer Aspire E5-573, with the Elantech touchpad.

The touchpad was working fine in 4.2.0. But for some reason cannot be activated now.

Output of xinput list

⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ ELAN0501:00 04F3:300B Touchpad          	id=12	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ Power Button                            	id=6	[slave  keyboard (3)]
    ↳ Video Bus                               	id=7	[slave  keyboard (3)]
    ↳ Power Button                            	id=8	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=9	[slave  keyboard (3)]
    ↳ HD WebCam                               	id=11	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=13	[slave  keyboard (3)]
    ↳ Acer WMI hotkeys                        	id=14	[slave  keyboard (3)]

On the same machine, with Ubuntu 14.04  (3.13.0-73), the output is-

⎜   ↳ ETPS/2 Elantech Touchpad                	id=12	[slave  pointer  (2)]

instead of ELAN0501:00 04F3:300B Touchpad.

I tried this -
https://bugs.launchpad.net/ubuntu/+sour … mments/137

But it did not work (and someone posted somewhere on the forum that dkms is unsupported for kernel 4.4).

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#2 2016-02-04 18:29:37

lucky001
Member
Registered: 2016-02-04
Posts: 4

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

Hi there,
You can quick check if your BIOS have a switch basic/advanced for the touchpad settings. On my Acer TMP236 I am only able to use it on basic since 4.4, no difference whatsoever.

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#3 2016-02-04 19:53:52

freefall
Member
Registered: 2015-12-06
Posts: 5

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

lucky001 wrote:

Hi there,
You can quick check if your BIOS have a switch basic/advanced for the touchpad settings. On my Acer TMP236 I am only able to use it on basic since 4.4, no difference whatsoever.

Great, that restored the basic functionality!
Many thanks.

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#4 2016-02-04 20:10:54

kaldøran
Member
Registered: 2015-02-04
Posts: 17

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

Hi i've got the same problem but i've got no option for touchpad in bios..
Do you have more idea please ?

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#5 2016-02-04 20:40:59

lucky001
Member
Registered: 2016-02-04
Posts: 4

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

What if you try to blacklist psmouse ?
maybe it should load elan_i2c driver ...

current basic mode/psmouse module:
xinput:
Virtual core pointer                                id=2       [master pointer  (3)]
↳ Virtual core XTEST pointer                  id=4            [slave  pointer  (2)]
↳ ETPS/2 Elantech Touchpad                    id=11    [slave  pointer  (2)]

lsmod:
psmouse               118784  0
libps2                    16384    2 atkbd,psmouse
serio                      20480    6 serio_raw,atkbd,i8042,psmouse

Well...it's a driver bug who is built into kernel. Touchpad is not discovered via i2c bus, only as serio device(in case you have that bios switch), wait for a patch.
...
You should also try to blacklist only i2c-hid.

Last edited by lucky001 (2016-02-04 22:09:42)

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#6 2016-02-07 06:43:47

coolgoose54
Member
Registered: 2015-12-09
Posts: 25

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

I have the same issue on an Acer E15. I tried blacklisting i2c_hid, hid_multitouch, mousedev, but none of them helped. The only thing that worked was to downgrade to 4.3.3.

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#7 2016-02-07 22:39:40

CFP
Member
Registered: 2015-11-22
Posts: 10

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

Same issue for me, downgrading to 4.3.3 is the only way to make the touchpad work again.

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#8 2016-02-16 12:19:13

loqs
Member
Registered: 2014-03-06
Posts: 18,091

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

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#9 2016-02-19 22:28:44

efngn
Member
Registered: 2016-02-17
Posts: 15

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

loqs, the link is gone

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#10 2016-02-19 22:35:39

loqs
Member
Registered: 2014-03-06
Posts: 18,091

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

4.4.2 has been released so the link no longer works (link to when it was in the stable queue)
https://git.kernel.org/cgit/linux/kerne … 1dab0e9496
4.4.2 should appear in testing soon
Edit:
link to the commit now in the 4.4.2 stable tree
https://git.kernel.org/cgit/linux/kerne … 90119fe1e0

Last edited by loqs (2016-02-19 22:45:05)

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#11 2016-02-19 22:50:42

efngn
Member
Registered: 2016-02-17
Posts: 15

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

Sorry, but what the hell do I do with that?

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#12 2016-02-21 19:45:33

zeezerzots
Member
Registered: 2016-02-21
Posts: 2

Re: Touchpad stopped working with the latest update [Kernel 4.4.1-2]

linux-4.4.2-1 is in testing right now and works perfectly on my Acer Aspire E15 w/ elantech touchpad. Just grabbed it from the arch packages repo and pacman -U installed it.

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