** Changed in: linux (Ubuntu Bionic)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1789790
Title:
Fix Intel Cannon Lake LPSS I2C input clock
Status in HWE Next:
New
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Bionic:
Fix Committed
Bug description:
===SRU Justification===
[Impact]
i2c-hid touchpad stops working after a short usage, i2c controller timed
out:
[ 65.867065] i2c_hid i2c-DELL08CC:00: i2c_hid_get_input: incomplete
report (14/17415)
[ 65.895356] i2c_hid i2c-DELL08CC:00: i2c_hid_get_input: incomplete
report (14/15240)
[ 66.127727] i2c_hid i2c-DELL08CC:00: i2c_hid_get_input: incomplete
report (14/65365)
[ 71.720018] i2c_designware i2c_designware.0: i2c_dw_handle_tx_abort:
lost arbitration
[ 72.736023] i2c_designware i2c_designware.0: controller timed out
[Fix]
Update Intel Cannon Lake LPSS with correct clock rate. This is a
fallback value when platform ACPI doesn't define one.
[Test]
The touchpad works correctly after this patch gets applied.
[Regression Potential]
Low. This patch is already in linux-stable, also no functional change
other than updated clock rate.
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