Logitech USB PS/2 mouse is mistaken for Elantech Touchpad

Some additional infos

Mouse model is M-BT58

The mouse is misindentified only if attached over PS/2 adapter. If attached directly on an USB port, then it is recognised properly as Logitech USB-PS/2 Optical Mouse (lshal output for this case attached).

'udevadm info --attribute-walk' output for the mouse attached on PS/2 port.
VendorID=0002, ProductID=000E

'udevadm info --attribute-walk' output for the mouse attached on USB port.
VendorID=046D, ProductID=C03E

Ok. I have taken the a look at the patch linked from the introduction to this patch. Following that thread I have taken the patch and improved it as suggested in that thread. I have applied the improved patch to the latest Jaunty kernel and built test kernels with that patch applied. Could those of you with this hardware try this out with any workarounds disabled, and report back here. Kernels can be found at the URL below:

    http://people.ubuntu.com/~apw/lp318722-jaunty/

Yep, it works for me. dmesg output attached. I'm also sending a comment to the folks with real Elantech hardware, affected by LP#123775 to check out that this fix doesn't bring any regressions to them.

@Sergey -- that sounds like an excellent plan. Will get with the partial patch reporter and find out what happened to it.

Hi guys,

don't know if this will help, but while searching for a solution for bugs lp:335297, i find that they're now a official patch upstream for 2.6.29+ concerning the logitech mouse which are detected as elantech touchpad.

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=9ab7b25e6a30d2292bd6d4913b71c918ee1e21b4

Thanks. Well, it's actually in 2.6.29-rc7 already:
http://lwn.net/Articles/321778/

This bug was fixed in the package linux - 2.6.28-11.35

---------------
linux (2.6.28-11.35) jaunty; urgency=low

  [ Amit Kucheria ]

  * Updating imx51 configs

  [ Andy Whitcroft ]

  * SAUCE: hotkey quirks for various Zeptro Znote and Fujitsu Amilo laptops
    - LP: #330259

  [ Tim Gardner ]

  * Revert "SAUCE: (drop after 2.6.28) eCryptfs: Don't encrypt file key
    with filename key". Use upstream commit.
  * CONFIG_SECURITY_DEFAULT_MMAP_MIN_ADDR set to upstream defaults.
    64K for x86'en, 32K for ARM
    - LP: #344955

  [ Upstream Kernel Changes ]

  * eCryptfs: don't encrypt file key with filename key
  * libata: set NODEV_HINT for 0x7f status
    - LP: #293218
  * USB: cdc-acm: Add another conexant modem to the quirks
    - LP: #323829
  * Input: elantech - touchpad driver miss-recognising logitech mice
    - LP: #318722

 -- Tim Gardner <email address hidden> Wed, 18 Mar 2009 08:52:46 -0600