I can also confirm that setting
GRUB_CMDLINE_LINUX_DEFAULT=tpm_tis.force=1 and running sudo update-
grub fixed this problem on an Acer C720 Chromebook, running the default
kernel that installs with Ubuntu 14.04.
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I have a Samsung NP530U3C-A01 laptop and I can confirm this bug affects
my laptop. After applying the workaround script from juanmanuel in #3
and #4 I re-tested and the problem no longer appears.
Thanks juanmanuel for writing the fix and being so patient with Ubuntu's
ridiculous bug policies -
@andrea-lazzarotto
To be fair it does say One defect, per person, per hardware, per report at
https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue.
The 'One defect, per person' is obviously stupid when there's 100 of us
with the same hardware and same problem,
@Jackson
There's no need to downgrade the kernel anymore. The workaround, which I use on
my C720 and it works is:
1. Open the file /etc/default/grub as root in a text editor with: gksu gedit
/etc/default/grub
2. change the line: GRUB_CMDLINE_LINUX_DEFAULT=tpm_tis.force=1 and save
changes
3.
You shouldn't have needed to replace the kernel, the workaround I posted
works with the normal kernels from 14.04. But anyway it doesn't do any
harm, and you don't need to worry about 'locking' the kernel - apt-get
won't replace your kernel 3.17 package with any of the ones from 14.04
because
Public bug reported:
In the current kernel release for trusty (linux-image-3.13.0-35-generic
3.13.0-35.62) the touchpad on my Lenevo Yoga 2 Pro laptop is correctly
detected as a touchpad device. In the latest kernel in trusty-proposed
(linux-image-3.13.0-36-generic 3.13.0-36.63) this device is
Xorg.0.log showing Xorg detecting the touchpad incorrectly as a mouse pointer:
[11.016] (II) config/udev: Adding input device PS/2 Synaptics TouchPad
(/dev/input/event4)
[11.016] (**) PS/2 Synaptics TouchPad: Applying InputClass evdev pointer
catchall
[11.016] (II) Using input driver
I'm no longer using the kernel from -proposed - I'm using the kernel from the
Ubuntu main (and main/updates) repos on trusty:
Linux localhost 3.13.0-36-generic #63-Ubuntu SMP Wed Sep 3 21:30:07 UTC 2014
x86_64 x86_64 x86_64 GNU/Linux
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** Attachment added: output of xinput --list
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1372520/+attachment/4212378/+files/xinput
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** Attachment added: /proc/bus/input/devices
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1372520/+attachment/4212377/+files/devices
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The latest kernel doesn't seem to have made a difference:
[53.415] (II) config/udev: Adding input device PS/2 Synaptics TouchPad
(/dev/input/event4)
[53.415] (**) PS/2 Synaptics TouchPad: Applying InputClass evdev pointer
catchall
[53.415] (II) Using input driver 'evdev' for 'PS/2
I have a Yoga 2 Pro and I can confirm that the ideapad_laptop module in
3.17 rc6 is fixed. Can we look at backporting this module to the trusty
kernel as a fix? Happy to help with testing or anything like that
Linux localhost 3.17.0-031700rc6-generic #201409211935 SMP Sun Sep 21
23:37:11 UTC 2014
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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https://bugs.launchpad.net/bugs/1372520
Title:
On Lenovo Yoga 2 Pro laptop PS/2 Synaptics TouchPad
I no longer get this problem with the Utopic kernel from the LTS
Enablement Stack in Ubuntu 14.04.2. Previously I had to manually build a
fixed version the driver ideapad-laptop after each kernel update, this
seems to no longer be necessary on my Yoga 2 Pro.
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** Summary changed:
- Na Lenovo Yoga 2 Pro notebook PS / 2 Touchpad Synaptics rozpoznána jako
ukazovací zařízení s Xorg
+ On Lenovo Yoga 2 Pro laptop PS/2 Synaptics TouchPad detected as pointer
device by Xorg
** Description changed:
- V aktuální verzi jádra pro trusty (linux -image 3.
Seems this problem might not be occurring anymore with the Vivid HWE:
[11.783] (II) config/udev: Adding input device ELAN Touchscreen (/dev/input
/event7)
[11.783] (**) ELAN Touchscreen: Applying InputClass "evdev touchscreen catc
hall"
[11.783] (II) Using input driver 'evdev' for
Same problem here on Ubuntu 16.04 with BTRFS RAID-1 on LUKS partitions
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https://bugs.launchpad.net/bugs/1651435
Title:
BTRFS error: could not find root 8
Status in linux
17 matches
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