Dell Precision 5550 takes up to 10 seconds to respond when coming out of sleep

[AceLan Kao]

[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.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 5.11.0-13.14

---------------
linux (5.11.0-13.14) hirsute; urgency=medium

  * CVE-2020-27170
    - bpf: Prohibit alu ops for pointer types not defining ptr_limit
    - bpf, selftests: Fix up some test_verifier cases for unprivileged

  * CVE-2020-27171
    - bpf: Fix off-by-one for area size in creating mask to left

 -- Andrea Righi <email address hidden> Fri, 19 Mar 2021 16:49:32 +0100

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-oem-5.10 - 5.10.0-1021.22

---------------
linux-oem-5.10 (5.10.0-1021.22) focal; urgency=medium

  * focal/linux-oem-5.10: 5.10.0-1021.22 -proposed tracker (LP: #1922921)

  * Display abnormal on the TGL+4k panel machines (LP: #1922885)
    - drm/i915/display: Do not allow DC3CO if PSR SF is enabled
    - SAUCE: drm/i915/display/psr: Disable DC3CO when the PSR2 is used

  * Fix mic on P620 after S3 resume (LP: #1921757)
    - ALSA: usb-audio: Carve out connector value checking into a helper
    - ALSA: usb-audio: Check connector value on resume

 -- Timo Aaltonen <email address hidden> Wed, 07 Apr 2021 18:07:55 +0300

[Brian Murray (brian-murray)]

The Groovy Gorilla has reached end of life, so this bug will not be fixed for that release