Bug 1222592 - External USB-C dockstation not working after update from 15.5 to 15.6
Summary: External USB-C dockstation not working after update from 15.5 to 15.6
Status: NEW
Alias: None
Product: openSUSE Distribution
Classification: openSUSE
Component: Kernel:Drivers (show other bugs)
Version: Leap 15.6
Hardware: Other Other
: P5 - None : Normal (vote)
Target Milestone: ---
Assignee: Kernel Bugs
QA Contact: E-mail List
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Reported: 2024-04-10 07:22 UTC by Adrian Schröter
Modified: 2024-04-10 07:27 UTC (History)
1 user (show)

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Description Adrian Schröter 2024-04-10 07:22:01 UTC 
After updating from 15.5 to 15.6 the external docking station of my Dell Latitude 7490 (former standard SUSE company notebook) is mostly not usable anymore:

 - LAN port is still working
 - external monitor was not anymore discovered
 - plug'd in USB devices are not discovered anymore

lspci did show the thunderbolt devices, but kernel messages also showed

 pcieport 0000:03:00.0: BAR 13: no space for [io  size 0x2000]
 pcieport 0000:03:00.0: BAR 13: failed to assign [io  size 0x2000]

using additional parameters

  i915.enable_dc=0 pci=realloc,assign-busses,hpbussize=0x33

did bring back the monitor support (without the i915 parameter the system crashed  on boot, black screen, blinking caps-lock)
Comment 1 Adrian Schröter 2024-04-10 07:27:02 UTC 
Fabian pointed to this here as background: 

https://fabiensanglard.net/a_linux_evening/index.html