Fix I2C touchpanels' interrupt storms after system suspend
Bug #1792309 reported by
Kai-Heng Feng
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned | ||
Cosmic |
Fix Released
|
Undecided
|
Unassigned | ||
linux-oem (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned | ||
Cosmic |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
[Impact]
Some I2C touchpanels generate IRQ storm after system suspend/resume.
[Test]
After applying the fix, the IRQ storm stops generated by Raydium touchpanels.
[Fix]
Instead of requesting i2c reset, simply requesting the device to power on. The HID over I2C spec doesn't specify how the device should do upon resume from suspend, so some devices expect a power on instead of reset.
[Regression Potential]
Low. I tested other vendors' touchpanels, didn't observe any side effect.
CVE References
tags: | added: originate-from-1788106 somerville |
Changed in linux (Ubuntu Bionic): | |
status: | New → In Progress |
Changed in linux (Ubuntu Cosmic): | |
status: | Incomplete → Fix Committed |
Changed in linux-oem (Ubuntu Cosmic): | |
status: | New → Invalid |
Changed in linux-oem (Ubuntu Bionic): | |
status: | New → Fix Committed |
Changed in linux-oem (Ubuntu Cosmic): | |
status: | Invalid → Fix Released |
Changed in hwe-next: | |
status: | New → Fix Released |
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This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1792309
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.