** Changed in: linux (Ubuntu Focal)
Status: Fix Committed => In Progress
** Changed in: linux (Ubuntu Groovy)
Status: Fix Committed => In Progress
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https://bugs.launchpad.net/bugs/1919123
Title:
Dell Precision 5550 takes up to 10 seconds to respond when coming out
of sleep
Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Committed
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux source package in Focal:
In Progress
Status in linux-oem-5.10 source package in Focal:
Fix Committed
Status in linux source package in Groovy:
In Progress
Status in linux source package in Hirsute:
Fix Committed
Bug description:
[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.
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