** Also affects: linux-oem (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-oem (Ubuntu Cosmic)
Status: New => Invalid
** Changed in: linux-oem (Ubuntu Bionic)
Status: New => Fix Committed
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem in Ubuntu.
https://bugs.launchpad.net/bugs/1792309
Title:
Fix I2C touchpanels' interrupt storms after system suspend
Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Committed
Status in linux-oem package in Ubuntu:
Invalid
Status in linux source package in Bionic:
In Progress
Status in linux-oem source package in Bionic:
Fix Committed
Status in linux source package in Cosmic:
Fix Committed
Status in linux-oem source package in Cosmic:
Invalid
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1792309/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
