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Asus K43E with Ubuntu 11.04 / Linux Mint 11 / 2.6.38 Kernel touchpad

30 May 2011 7 Comments

I just bought this laptop yesterday. I’ve just solved issue 1 of 3 (all issues as of 26/7/11)

1. Touchpad isn’t recognised as a touchpad but rather a mouse and so can’t “disable touchpad while typing” causing me to constantly bump it.
2. Suspend / Resume isn’t working.. I will fix this soon (fixed: 26/07/11)
3. Slight high-pitched noise coming from built-in mic. (fixed: 26/07/11)
4. Don’t run ecrypt-fs on your /home partition. It causes a lot of freezing.
5. My grub config now /etc/default/grub now has the following. The semaphore line fixes some small temporary locks in 3D graphics. ie: if you run glxgears and it freezes every 10 seconds or so, the semaphores line fixes that. The pcie_aspm=force switch is supposed to fix the 2.6.38 kernel issue consuming up to 30% more power. I haven’t noticed a great difference though. I get about 4.5 hours of continuous use. Remember to run grub-update after making the changes.

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.semaphores=1 pcie_aspm=force"

So, fixing number 1 took a few goes to track down. Basically, the kernel isn’t detecting the Touchpad properly and everything loads as a mouse.

You need to rebuild the mouse kernel module, so combine the steps from this url


but when you get to Step 5, use this patch instead:
wget -O 01elantech_2.6.38.patch https://launchpadlibrarian.net/71387234/01elantech_2.6.38.patch
patch -p1 < 01elantech_2.6.38.patch

You will probably have to: sudo apt-get install gsynaptic also.

Update: 26/07/11

Finally, the suspend issue bugged me enough to find an answer. Following the steps in this post to get pm-suspend to finally work did the trick!

ls /sys/bus/pci/drivers/ehci_hcd/

Gives me:


Replace below XXXX:XX:XX.X with your
# File: "/etc/pm/sleep.d/20_custom-ehci_hcd".
case "${1}" in
# Unbind ehci_hcd for first device XXXX:XX:XX.X:
echo -n "XXXX:XX:XX.X" | tee /sys/bus/pci/drivers/ehci_hcd/unbind
# Unbind ehci_hcd for second device XXXX:XX:XX.X:
echo -n "XXXX:XX:XX.X" | tee /sys/bus/pci/drivers/ehci_hcd/unbind
# Bind ehci_hcd for first device XXXX:XX:XX.X:
echo -n "XXXX:XX:XX.X" | tee /sys/bus/pci/drivers/ehci_hcd/bind
# Bind ehci_hcd for second device XXXX:XX:XX.X:
echo -n "XXXX:XX:XX.X" | tee /sys/bus/pci/drivers/ehci_hcd/bind

And then add

#File: "/etc/pm/config.d/usb3-suspend-workaround".


  • gep said:

    Thank you for your post. In fact you forgot to say that you need +X rights for /etc/pm/sleep.d/20_custom-ehci_hcd this file

  • A new laptop, with Fedora 16 on it | My Tech Life said:

    [...] successfully enable suspend, by following instructions from this blog post. Incidentally the author of the blog owns Asus K43E which seems similar to my laptop. Unfortunately [...]

  • VuVo said:

    Thank you for solving my issue.

  • leonardo said:

    hey man, do u know if it can resolve the same problem in ubuntu 10.10?

    greetings from mexico.

  • salubrium (author) said:

    Pero cual problema exactamente? Estoy en Colombia ahora y mi amigo compre la mismo portatil ayer. Con Ubuntu 12.04, todo esta perfect excepto “suspend”.

  • Lisa Floss said:

    I’ve had the touchpad issue for quite a while now. It’s really such a hassle. Thanks for sharing the solution!

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