Looks to me like the patch is in Ubuntu kernel.
http://kernel.ubuntu.com/git/kernel-
ppa/mirror/linux.git/tree/drivers/mfd/intel-lpss-pci.c
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http://kernel.ubuntu.com/git/kernel-
ppa/mirror/linux.git/tree/drivers/mfd/intel-lpss-pci.c
Looks like the source is now fixed.
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https://bugs.launchpad.net/bugs/1710392
The title of the email might be better to include the directory path to
the file, and a brief description.
Use the body of the email to mention Lenovo.
I assume you already got that feedback...
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Please do use my email or name, etc.
B
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https://bugs.launchpad.net/bugs/1700657
Title:
Touchpad not detected in Lenovo X1 Yoga / Yoga 720-15IKB
Status in Linux:
I changed it to confirmed, although I am the reporter.
I found the patch is missing in the ubuntu kernel source:
https://git.launchpad.net/~ubuntu-kernel-test/ubuntu/+source/linux/+git
/mainline-crack/tree/drivers/mfd/intel-lpss-pci.c
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The bug exists upstream in 4.13-rc4
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Sorry, to answer the first question, the latest kernels do boot on the
machine, the trackpad isn't recognized and doesn't respond to anything
at all.
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No.
The laptop is a 2017 model. The source file in question simply doesn't
have an array element that describes/identifies the trackpad. My
assumption is that the driver maintainer simply hasn't seen a device
with this ID before.
I would be happy to test the latest kernel, but I don;'t see the
I searched the WWW for any kind of solution to the trackpad not being
recognized. There are several months of similar questions, but no
resolution. Until this patch was made public/known.
Further discussion here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1700657
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Public bug reported:
There's just a 1 line patch required, to add an initializer to array of
structs scanned to match up the device ID with driver.
The PR is here:
https://github.com/torvalds/linux/pull/444#discussion_r131229815
I've applied the patch and created and booted from a custom
@kaihengfeng
Can you please assure this gets in the queue to get merged into master?
The file in question hasn't been changed since early July, so not
merged. It would be awesome to not have to build custom kernels all the
time the kernel needs to be updated.
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@CoolStar nothing to do.
https://github.com/torvalds/linux/pull/444
@Hoeze made the PR already.
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Title:
Touchpad not detected in
I must say the 720 is zippy to use. It took me 36-38 minutes to do a
complete kernel build. apt-et update/upgrade takes just a few seconds.
At least with KDE (other desktops may vary), I was able to adjust the
font sizes, and other window decorations and the like to make the
environment look
@CoolStar You have to change the bios to AHCI for the USB thumbdrive
install image to boot. At least for me. I mean, we all have the same
Yoga 720 15" laptop, right?
I didn't want to toast my Windows 10 install, so I resized the Windows
partition to 1/2, leaving 1/2 for Ubuntu.
The
definitely. If I sudo reboot, I get black screen and no boot. If I
power off the machine and boot, it works.
Could be the RC kernel.
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It seems that I have to power off the laptop and power it on to reboot,
or I just get a black screen.
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Title:
Touchpad not detected
I got it working!
It was definitely a bios setting. I made every paranoid kind of change
without resorting to changing to legacy boot mode.
4.13.0-rc3 with the patch works. I have trackpad.
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The patch isn't in the 4.13 master branch code.
https://github.com/torvalds/linux/blob/master/drivers/mfd/intel-lpss-
pci.c
I think someone needs to make a pull request and lobby to get it merged
:)
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@bjorn exactly what I did.
Windows 10 shows up under Ubuntu and Advanced Boot options on the Grub
screen, and it boots into Windows 10 just fine.
And the trackpad works in Windows... BOO!
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@bjorn I have come to the same conclusion. THere's something about the
kernel build process that yields a kernel that won't work due to some
setting in the BIOS. Yet kernels on the install media and from apt-get
dist-upgrade do work fine.
I tried turning on and off secure boot, etc., with no
Thanks
How long does it take for an upstream fix?
I'm a long time C/C++ programmer (40+ years). I built kernels since the
0.99 days...
So far, though, all I'm getting is black screens after loading the ram
disk. Seems like the graphics drivers aren't loading. Normally the
screen shows the
^^^ Sorry, that was 17.04 (Kubuntu)
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Title:
Touchpad not detected in Lenovo X1 Yoga / Yoga 720-15IKB
Status in Linux:
Unknown
Instructions in post #30 did not work for me. In fact, my machine now
won't boot.
Fresh install of kubuntu 16.04.
Downloaded the 3 .deb files, dpkg -i them all
Downloaded the .ko file and copied over the specified location
System boots into busybox command prompt
Choosing the previous kernel,
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