Bug 1222592

Summary:	External USB-C dockstation not working after update from 15.5 to 15.6
Product:	[openSUSE] openSUSE Distribution	Reporter:	Adrian Schröter <adrian.schroeter>
Component:	Kernel:Drivers	Assignee:	Kernel Bugs <kernel-bugs>
Status:	NEW ---	QA Contact:	E-mail List <qa-bugs>
Severity:	Normal
Priority:	P5 - None	CC:	fvogt
Version:	Leap 15.6
Target Milestone:	---
Hardware:	Other
OS:	Other
Whiteboard:
Found By:	---	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

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