[Bug 1813733] Re: Ignore "incomplete report" from Elan touchpanels

** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New

** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Status: Incomplete

** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New

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https://bugs.launchpad.net/bugs/1813733

Title:
Ignore "incomplete report" from Elan touchpanels

Status in HWE Next:
New
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Bionic:
New
Status in linux source package in Cosmic:
New
Status in linux source package in Disco:
Incomplete

Bug description:
[Impact]
When using Elan touchpanels, this message keeps getting spurted out:
[ 136.138487] i2c_hid i2c-DELL08D6:00: i2c_hid_get_input: incomplete report (14/65535)
This is an error message, so systemd-journald flushes to disk as soon as
the message shows. This prevents the storage enters power saving state,
hurting battery time.

Other than the annoying message, the touchpad itself works fine.

[Fix]
Just warn once to avoid the annoying message.

[Test]
The annoying message stops once the fix applied.

[Regression Potential]
None. The user still gets the warning from dmesg without all the
flooding.

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