Bug 10721

Summary:	Synaptics touchpad not working anymore
Product:	Drivers	Reporter:	David Paleino (d.paleino)
Component:	Input Devices	Assignee:	drivers_input-devices
Status:	REJECTED UNREPRODUCIBLE
Severity:	high	CC:	akpm, dmitry.torokhov, pablolm2005
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.23	Subsystem:
Regression:	Yes	Bisected commit-id:
Attachments:	/proc/bus/input/devices dmesg from 2.6.25.3 lspci -vv

Description David Paleino 2008-05-16 07:07:58 UTC

Latest working kernel version: 2.6.23
Earliest failing kernel version: 2.6.23
Distribution: Debian GNU/Linux unstable/experimental
Hardware Environment: notebook, HP Compaq 6720s
Problem Description:

Some time ago, I experienced a problem with the synaptics touchpad not being recognized anymore by the kernel. It worked with a 2.6.23 kernel, and didn't work after a system upgrade, under the same kernel (don't really remember if it was some different minor revision, sorry). I suspect something went very wrong with the input subsystem / udev / ... .

I've already reported to the Debian BTS (<http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=475852>), and I've been pointed here.

Under suggestion of one of the Debian maintainers, here are some more informations about the problem:

- I've found, googling a bit, that this might be related (kernel option i8042.debug=1 at boot time -- relevant bits only):

===> dmesg <===
...
[    1.357240] PNP: PS/2 Controller [PNP0303:C297,PNP0f13:C298] at 0x60,0x64 irq 1,12
[    1.357480] drivers/input/serio/i8042.c: 20 -> i8042 (command) [0]
[    1.357541] drivers/input/serio/i8042.c: 65 <- i8042 (return) [0]
[    1.357547] drivers/input/serio/i8042.c: 60 -> i8042 (command) [0]
[    1.357606] drivers/input/serio/i8042.c: 74 -> i8042 (parameter) [0]
... (so on for a while)
[    1.359293] i8042.c: Detected active multiplexing controller, rev 1.1.
...
[    1.360088] serio: i8042 KBD port at 0x60,0x64 irq 1
[    1.360189] serio: i8042 AUX0 port at 0x60,0x64 irq 12
[    1.360292] serio: i8042 AUX1 port at 0x60,0x64 irq 12
[    1.360394] serio: i8042 AUX2 port at 0x60,0x64 irq 12
[    1.360496] serio: i8042 AUX3 port at 0x60,0x64 irq 12
[    1.363310] mice: PS/2 mouse device common for all mice
...
[    1.384094] drivers/input/serio/i8042.c: MUX error, status is 75, data is fe [7]
[    1.384097] drivers/input/serio/i8042.c: fe <- i8042 (interrupt, 3, 12, timeout) [7]
...
[    1.386792] drivers/input/serio/i8042.c: 91 -> i8042 (command) [7]
[    1.386850] drivers/input/serio/i8042.c: ed -> i8042 (parameter) [7]
[    1.387027] drivers/input/serio/i8042.c: MUX error, status is 75, data is fe [7]
[    1.387030] drivers/input/serio/i8042.c: fe <- i8042 (interrupt, 3, 12, timeout) [7]
[    1.391204] drivers/input/serio/i8042.c: 92 -> i8042 (command) [8]
[    1.391263] drivers/input/serio/i8042.c: f2 -> i8042 (parameter) [8]
[    1.391738] drivers/input/serio/i8042.c: MUX error, status is b5, data is fe [8]
[    1.391741] drivers/input/serio/i8042.c: fe <- i8042 (interrupt, 4, 12, timeout) [8]
[    1.391750] drivers/input/serio/i8042.c: 92 -> i8042 (command) [8]
[    1.391808] drivers/input/serio/i8042.c: ed -> i8042 (parameter) [8]
[    1.392637] drivers/input/serio/i8042.c: MUX error, status is b5, data is fe [9]
...
===> <===

- "plain" dmesg after boot: see attachment

- $ uname -a
Linux pingu 2.6.25-2-686 #1 SMP Wed May 14 16:42:03 UTC 2008 i686 GNU/Linux
(that is 2.6.25.3)

- lspci -vv: see attachment
- /proc/bus/input/devices: see attachment.

I've set the severity to "high", since the touchpad is a fundamental component of a laptop ;) (currently using a USB-mouse).

Thanks,
David

Comment 1 David Paleino 2008-05-16 07:08:56 UTC

Created attachment 16163 [details]
/proc/bus/input/devices

Comment 2 David Paleino 2008-05-16 07:11:21 UTC

Created attachment 16164 [details]
dmesg from 2.6.25.3

Comment 3 David Paleino 2008-05-16 07:11:45 UTC

Created attachment 16165 [details]
lspci -vv

Comment 4 Dmitry Torokhov 2008-05-16 10:20:20 UTC

Is the touchpad disabled in BIOS or turned off with a key-switch by any chance?

Comment 5 Andrew Morton 2008-05-16 10:54:42 UTC

I'll tentatively mark this as a regression, even though it might not be ;)

Comment 6 Dmitry Torokhov 2008-05-16 11:09:01 UTC

Well, since you mark everything as a regression its ok ;)

Comment 7 David Paleino 2008-05-16 11:38:25 UTC

Dmitry: do you really think my touchpad is disabled and I did not check it? ;)
No, really. It's not disabled.

Thanks for the reply (to both!)

Comment 8 Dmitry Torokhov 2008-05-16 13:15:47 UTC

Given that the very same kernel image stopped detecting the piece of hardware yeah... either ist is disabled somewhere or connector inside your laptop got disconnected.

Comment 9 David Paleino 2008-05-16 13:18:39 UTC

Hm, your reasoning has a rationale, after all :)
I'll check ASAP the internal connector -- I can't believe it's just that.

Comment 10 Pablo López Martín 2009-04-02 11:31:21 UTC

I have the same problem as David. I confirm bug in kernels 2.6.26 and 2.6.29. I'm using an ALPS Touchpad in my Toshiba Satellite Pro M10. "Advanced features" in X like vertical/horizontal scrolling don't work because kernel doesn't recognize the mouse as a touchpad but as a "PS/2 Generic Mouse". I've looked in launchpad/google/debian bugtrack systems and this problem affects a lot of distros/hardware. All points it's a problem with the input subsystem. I've seen reports of people that say adding i8042.nomux=1 on boot fixes it for them. It doesn't for me. It's not a hardware error (at least in my case) because touchpad works flawless in windows. It does look like a regression because this touchpad usd to work for me on a debian of 4 years ago (sorry i dont remember kernel version because i did a fresh install on this long forgotten laptop).

Sorry for my sucky english and worse presentation skills, tell me if you need any more information attached.

Thanks in advance,

~ Pablo

Comment 11 Dmitry Torokhov 2009-04-12 03:12:44 UTC

Pablo,

Was there a kernel version that ever recognized your touchpad as ALPS? Is it recognized as ALPS in the $other_os?

Thanks.

Comment 12 Pablo López Martín 2009-04-14 18:15:09 UTC

Yes, I had a backup of the old xorg.conf and the touchpad was there autoconfigured as an ALPS Touchpad. I don't remember the kernel version where it used to work though, but it was the newest kernel version of 4 years ago, sorry to not being able to be more specific.

Thanks.

Comment 13 Dmitry Torokhov 2009-04-15 02:24:58 UTC

Could you please boot with i8042.debug kernel option and send me your full dmesg? Thanks!

Comment 14 Dmitry Torokhov 2009-04-15 02:25:51 UTC

Oh, and lets open another bug because I think this issue is different from David's.

Comment 15 Pablo López Martín 2009-04-18 01:35:21 UTC

Ok, opened new bug: http://bugzilla.kernel.org/show_bug.cgi?id=13134
Attached full dmesg with i8042.debug option there.

Thanks