blacklisting i2c_i801 breaks trackpad detection on Acer C710, plus other hardware

Bug #1475945 reported by Ewan
This bug report is a duplicate of:  Bug #1786574: remove i2c-i801 from blacklist. Edit Remove
This bug affects 2 people
Affects Status Importance Assigned to Milestone
kmod (Ubuntu)

Bug Description


contains the text:
# causes failure to suspend on HP compaq nc6000 (Ubuntu: #10306)
blacklist i2c_i801

note: actually the correct LP id appears to be

after short discussion at I'm raising this as a bug

as well as preventing trackpad detection in the case of Acer C710, there is an older bug open at Here this same blacklist entry breaks some functionality for a Thinkpad T41. In turn, that bug includes a reference to another source ( where the blacklist entry has required support effort.

lsb_release -rd
Description: Ubuntu 15.04
Release: 15.04

apt-cache policy kmod
  Installed: 18-3ubuntu1
  Candidate: 18-3ubuntu1
  Version table:
 *** 18-3ubuntu1 0
        500 vivid/main amd64 Packages
        100 /var/lib/dpkg/status

Revision history for this message
Javier Vilalta (jvilalta) wrote :

I have found that iTCO_wdt doesn't work without previously loading i2c-i801 (you can see a pair of references in and in As it's blacklisted, it doesn't load even when putting it on /etc/modules.
As stated by OP on launchpad discussion, it seems that the original decission to blacklist i2-i801, as correct as it was in its moment, seems to be creating more problems now for modern systems.

Revision history for this message
Olivier Louvignes (olouvignes) wrote :

Can confirm that I currently have this issue when trying to load the iTCO_wdt at boot.

We should have a way to whitelist back a module without having to edit the blacklist files.

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in kmod (Ubuntu):
status: New → Confirmed
To post a comment you must log in.
This report contains Public information  Edit
Everyone can see this information.

Other bug subscribers

Related questions