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Old 08-26-2017, 03:15 PM   #1
Bry1123
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touchpad not working on a dell inspiron 5755 after linux mint in stall


i installed linux mint 17 on a dell inspiron 5755 the touchpad is't working. keys work. i pluged in a wireless mouse it works. i am new to linux can anybody help. thanks
 
Old 08-26-2017, 09:08 PM   #2
frankbell
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I'd boot to a Live CD of something not related to Ubuntu and see if the touchpad works with it. If so, then it's a Mint problem. If not, it may be a problem with the touchpad itself.

Another thing you can do is run the command lspci (you may have to do this as root/with sudo). That should reveal the particular make/model of touchpad; post the relevant output here. Post the output(s) of the command here, being sure to surround it with code tags, which become available when you click the "Go Advanced" button beneath the "Compose Post" windows.

Last edited by frankbell; 08-26-2017 at 09:13 PM.
 
Old 08-26-2017, 10:20 PM   #3
ferrari
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Touchpads are not generally connected to PCI buses, but usually via an i8042 controller (or similar), so unlikely to be enumerated via the lspci command.

So, perhaps check the kernel messaging using something like
Code:
dmesg|egrep -i "touchpad|i8042|input"
If the touchpad is detected at the kernel level, you can then check how it is handled by Xorg...
Code:
grep "Using input driver" /var/log/Xorg.0.log
Code:
xinput list

Last edited by ferrari; 08-26-2017 at 10:23 PM.
 
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Old 08-26-2017, 10:28 PM   #4
frankbell
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Thanks, ferrari.

Personally, I loathe touch pads with the passion of seven suns, so you taught me something.
 
Old 08-26-2017, 10:30 PM   #5
ferrari
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I'm generally too lazy to plug a mouse in, so the touchpad is my pointing device by default.
 
Old 08-26-2017, 10:45 PM   #6
ferrari
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FWIW, a bug report for a similar Dell model, where it was found that the following workaround was needed

Quote:
1. Run
$ sudo -H gedit /etc/default/grub

In the open window edit line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

it should look this way

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i8042.nopnp"

Save file and run

$ sudo update-grub

2. Run
$ echo "blacklist i2c_hid" | sudo tee /etc/modprobe.d/i2c-hid.conf
$ sudo depmod -a
$ sudo update-initramfs -u
$ echo "synaptics_i2c" | sudo tee -a /etc/modules

3. Reboot.
This might be worth a shot.
 
Old 10-31-2017, 03:55 PM   #7
YourPalMark
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Quote:
Originally Posted by ferrari View Post
FWIW, a bug report for a similar Dell model, where it was found that the following workaround was needed



This might be worth a shot.
I just ran into the same issue after installing Linux Mint 18.2 on a Dell Inspiron 5565, and your suggestion did the trick. Thanks!
 
Old 10-31-2017, 08:27 PM   #8
ferrari
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I'm glad the advice shared from the bug report worked for you.
 
  


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