Yeah it sounds like the XPS 9575 is the main model affected. Also
Precision 5530 (comment #14).
** Summary changed:
- [Dell BIOSes dated 27 Mar 2019] laptop keyboard & touchpad not working at gdm
screen after boot
+ [Dell BIOSes dated 27 Mar 2019, XPS 9575, Precision 5530] laptop keyboard &
XPS 9575 isn't (currently) available for purchase with Ubuntu. So yes,
it's below the radar for something that is typically tested, tracked, or
fixed from a BIOS or validation team perspective.
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I can only imagine that it must be a small proportion of Dell systems
affected. Otherwise we would see more bug reports and interest here...
Mario?
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Is there any hope that this will ever be fixed because as Bryn points
out at #36 the temporary "fix" of downgrading the BIOS is far from
satisfying.
** Description changed:
On a dell XPS 15 2-in-1 with the latest 1.4.0 bios, my touchpad and keyboard
are unresponsive at the gdm login screen.
It's worth mentioning that even with the downgraded bios the mouse
cursor frequently gets stuck requiring a screen flex to fix.
In addition the downgraded bios exposes similar sticking on Windows. So
I can only imagine that resolving this was the purpose of the bios
update in the first place.
#32 is not working for Precision
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https://bugs.launchpad.net/bugs/1822394
Title:
[Dell BIOSes dated 27 Mar 2019] laptop keyboard & touchpad not working
at gdm screen after
Apologies, comment #32 is incorrect, this worked a couple times but the
problem is still present intermittently. I have since downgraded to BIOS
v1.2.0 to avoid the issue.
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That's interesting to me. Yes the EC will emulate an PS2 mouse until the
OS brings up the I2C controller. I would think you can accomplish a
similar result by blacklisting psmouse potentially.
Is this discussion in IRC or a mailing list?
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I believe I have a workaround provided by a kernel engineer I was
discussing the issue with.
Adding the following to the kernel boot options resulted in the keyboard
and touchpad working without issue:
i8042.nomux=1 i8042.reset
It appears that Dell uses i8042 to emulate a ps/2 interface
** Attachment added: "dmesg fedora rescue bios 1.6.1 keyboard usable"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1822394/+attachment/5280156/+files/boot_rescue_keyboard_usable_dmesg.log
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I can confirm I have encountered this issue with BIOS v. 1.6.1 from 21
Jul 2019
Device - Dell XPS 15 9575 Intel Core i7-8705G
BIOS - version 1.6.1
OS - Fedora 30
Kernel - kernel-5.1.19-300
Additional info:
- I have an encrypted root partition. During boot, I am able to usethe keyboard
for <1
user report:
device - Dell XPS 15 9575 (2018) Intel Core i5-8305G
BIOS - version 1.2.0
OS - Fedora 30 (Gnome Version 3.32.2)
No bugs reported. Everything works fine.
Guess this is no surprise as I am running an older BIOS version.
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This is information from Dell support team about 4.15 working and others
don't
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https://bugs.launchpad.net/bugs/1822394
Title:
[Dell BIOSes dated 27 Mar 2019] laptop keyboard
Can you confirm linux kernel v4.15 doesn't have this issue?
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https://bugs.launchpad.net/bugs/1822394
Title:
[Dell BIOSes dated 27 Mar 2019] laptop keyboard & touchpad not
Hey everyone,
is there any update on the issue?
Does the bug still occur with BIOS v. 1.6.1 from 21 Jul 2019?
Thanks in advance for your help.
Regards,
Simon
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** Tags added: cscc
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https://bugs.launchpad.net/bugs/1822394
Title:
[Dell BIOSes dated 27 Mar 2019] laptop keyboard & touchpad not working
at gdm screen after boot
To
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: libinput (Ubuntu)
Status: New => Confirmed
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There is symptom that if you wait for 30 seconds, input devices will
start to work again, without flipping hinge. Also closing lid to sleep
laptop and wake it again will work also. System engineer from Dell
reported that default kenrel 4.15 will not have this problem, every
other higher version
FWIW a few other messages pop up to me in the above logs as suspicious
to the described symptoms, especially with keyboard working in
cryptsetup.
Mar 31 10:34:45 taplop org.gnome.Shell.desktop[5876]: libinput error: client
bug: timer event25 debounce: offset negative (-111ms)
Mar 31 10:34:45
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