[Bugme-new] [Bug 10721] New: Synaptics touchpad not working anymore

bugme-daemon at bugzilla.kernel.org bugme-daemon at bugzilla.kernel.org
Fri May 16 07:07:59 PDT 2008


http://bugzilla.kernel.org/show_bug.cgi?id=10721

           Summary: Synaptics touchpad not working anymore
           Product: Drivers
           Version: 2.5
     KernelVersion: 2.6.23
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Input Devices
        AssignedTo: drivers_input-devices at kernel-bugs.osdl.org
        ReportedBy: d.paleino at gmail.com


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


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