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Hardware: Lenovo Yoga 370 with Lenovo USB-C dock 40A9 with dual monitors on
Display Ports.
Hardware updates: All bios, thunderbolt, dock firmware are updated with latest
versions.
Distribution: Ubuntu 22.04.2 LTS
Kernel: 5.19.0-35-generic
Issue: No display on external monitors. The monitors are getting detected in
Display Settings but there is no video.
Temporary fix: Switch to the previous kernel: 5.15.0-60-generic
Attachment: A complete dmesg output is attached.
dmesg -l err output when I plug in my USB-C connector of the doc:
subhajit@subhajit-ThinkPad-Yoga-370:~$ sudo dmesg -l err
[ 1128.136192] ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-95)
[ 1128.192050] ACPI BIOS Error (bug): AE_AML_PACKAGE_LIMIT, Index (0x000000007)
is beyond end of object (length 0x5) (20220331/exoparg2-393)
[ 1128.192180] ACPI Error: Aborting method \_SB.PCI0.LPCB.EC.BRNS due to
previous error (AE_AML_PACKAGE_LIMIT) (20220331/psparse-529)
[ 1128.192207] ACPI Error: Aborting method \_SB.PCI0.LPCB.EC._Q26 due to
previous error (AE_AML_PACKAGE_LIMIT) (20220331/psparse-529)
** Affects: linux-hwe-5.19 (Ubuntu)
Importance: Undecided
Status: New
** Tags: jammy
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External Monitors not working on Ubuntu 22.04.2 with kernel 5.19.0-35 with
USB-C dock
https://bugs.launchpad.net/bugs/2009105
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which is subscribed to linux-hwe-5.19 in Ubuntu.
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