Issue #596 has been updated by Paul Menzel.
Thank you for reporting the issue. For the attachment naming, I assume *td*
refers to *top down*, and *a4b* for *above 4G*?
Unfortunately, in the failure case, the log is not helpful for my ignorant eyes:
[DEBUG] PCI: 00:00:02.0 init
[INFO ] CBFS: Found 'vbt.bin' @0xcf780 size 0x48e in mcache @0x7abdd1e4
[INFO ] Found a VBT of 6144 bytes
[INFO ] GMA: Found VBT in CBFS
[INFO ] GMA: Found valid VBT in CBFS
[DEBUG] PCI: 00:00:02.0 init finished in 40 msecs
Could you enable libgfxinit debug logs? Maybe that shows something.
----------------------------------------
Bug #596: Allocate resources from top down AND extend PCIe resource window
above 4G together breaks libgfxinit bootscreen
https://ticket.coreboot.org/issues/596#change-2105
* Author: Walter Sonius
* Status: New
* Priority: Normal
* Target version: none
* Start date: 2025-05-19
* Affected versions: 25.03
----------------------------------------
When enabling both `Allocate resources from top down` [enabled by default and
fixed recently](https://review.coreboot.org/c/coreboot/+/87504) and `Extend
resource window for PCIe devices above 4G` libgfxinit will break during
bootscreen and other PCIe issues like failing wifi drivers may occur.
Tested coreboot-25.03-519-ga2010cf5eeea
(a2010cf5eeea6ad4a154cfb13760092f0865af3f) with Dell_Optiplex_5040_sff
(i3-6100) and earlier Coreboot 25.03-467-gf0ad05b57ebe with Lenovo
[x201](https://ticket.coreboot.org/issues/548#note-10) with MrChromeBox EDK2
2502.
Can/should these 2 options be used together, if I understand correctly when
using a modern efi GOP dGPU together with resizeable-bar all 3 options(+Support
PCIe Resizable BARs) need to be enabled?
Only using `Allocate resources from top down` or `Extend resource window for
PCIe devices above 4G` does not lead up to this issue.
---Files--------------------------------
cb-log-dell-5040-sff-notd-a4b-ok-bootscreen.txt (41 KB)
cb-log-dell-5040-sff-td-noa4b-ok-bootscreen.txt (41 KB)
cb-log-dell-5040-sff-td-a4b-no-bootscreen.txt (40.5 KB)
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