Public bug reported: [Impact] On some platforms, the EC doesn't support the register reading sequence for sentelic[1], and then make the EC can't respond commands for a while when probing. It leads to the keyboard is non-responsive for around 10 seconds while waking up from s2idle.
[ 44.304488] i8042: [9804] d4 -> i8042 (command) [ 44.304634] i8042: [9804] f3 -> i8042 (parameter) [ 44.304787] i8042: [9804] fa <- i8042 (interrupt, 1, 12) [ 44.304855] i8042: [9804] d4 -> i8042 (command) [ 44.304938] i8042: [9804] 66 -> i8042 (parameter) [ 44.337698] i8042: [9813] d4 -> i8042 (command) [ 44.905695] i8042: [9942] 88 -> i8042 (parameter) [ 45.497478] i8042: [10102] d4 -> i8042 (command) [ 46.098041] i8042: [10253] f3 -> i8042 (parameter) [ 46.098070] i8042: [10253] fe <- i8042 (interrupt, 1, 12) [ 46.718154] i8042: [10386] d4 -> i8042 (command) [ 47.309915] i8042: [10386] f4 -> i8042 (parameter) [ 47.918961] i8042: [10556] d4 -> i8042 (command) [ 48.402624] i8042: [10556] f6 -> i8042 (parameter) [Fix] A DMI quirk to mark this platform doesn't have aux device could avoid those commands to be sent. And the system could still using i2c interface to communicate with the touchpad. https://lkml.org/lkml/2021/3/15/126 [Test] Verified on Dell Precision 5550 [Where problem could occur] The quirk only affects the listed platform, there is no regression could occur. ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-5.10 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux (Ubuntu Focal) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-5.10 (Ubuntu Focal) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux (Ubuntu Groovy) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux (Ubuntu Hirsute) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Tags: oem-priority originate-from-1904649 somerville ** Also affects: linux-oem-5.10 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Hirsute) Importance: Undecided Status: New ** Also affects: linux-oem-5.10 (Ubuntu Hirsute) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: linux-oem-5.10 (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Groovy) Importance: Undecided Status: New ** Also affects: linux-oem-5.10 (Ubuntu Groovy) Importance: Undecided Status: New ** No longer affects: linux-oem-5.10 (Ubuntu Groovy) ** No longer affects: linux-oem-5.10 (Ubuntu Hirsute) ** Changed in: linux (Ubuntu Focal) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-5.10 (Ubuntu) Status: New => Invalid ** Changed in: linux (Ubuntu Groovy) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Hirsute) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-5.10 (Ubuntu Focal) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Focal) Status: New => In Progress ** Changed in: linux (Ubuntu Groovy) Status: New => In Progress ** Changed in: linux (Ubuntu Hirsute) Status: New => In Progress ** Changed in: linux-oem-5.10 (Ubuntu Focal) Status: New => In Progress ** Tags added: oem-priority originate-from-1904649 somerville -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1919123 Title: Dell Precision 5550 takes up to 10 seconds to respond when coming out of sleep To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1919123/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
