> Am I missing something to get the proposed
kernel?

I guess the same reason it's not migrating is the reason you can't
install it? Maybe some kernel team members can comment.

> It sounds like GTT access is what causes this issue, and that using the
bios option won't guarantee that it will never happen. Is that correct?

If you look at your journal from when this issue occurs you'll see an
IOMMU page fault. This is the IOMMU reporting that there was an
attempted access at memory that is out of the region that the GPU is
allowed to access. This can happen when there is a userspace driver bug
(IE mesa) or a misconfigured driver (IE amdgpu) or a faulty firmware (IE
the BIOS).

There have been cases of a white screen caused by an incorrect memory
addressing mask on systems with 64GB, but that's been fixed a long time
now.

It is definitely an attempt at accessing outside of VRAM but I have a
suspicion the address attempting to be addressed is ALSO outside of GTT.

> Interesting. If there's any extra info (or testing) I can provide to help
with debugging/fixing this issue, please let me know.

If you can add your details for your "specific" FW13 AMD to the upstream bug 
maybe others who are affected can help with building the pattern.
I mean the memory vendor, speed of memory, amount, channel configuration.

What you do to trigger it, etc.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/2056445

Title:
  external monitors flash white with every interrupt

Status in Linux:
  New
Status in linux package in Ubuntu:
  Triaged

Bug description:
  an interesting amdgpu issue:

  I currently have two external monitors, and only one will display the
  desktop at a time - the other is completely white. The interesting
  thing is that with each interrupt that the kernel receives from
  keyboard / mouse, the screens will flip which one is visible. With my
  monitors positioned above and to the left of the laptop's built-in
  display, the flashing monitors feel akin to attending an electronic
  light show, or perhaps a display of fireworks - the monitors flip
  visibility with each keypress.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: linux-image-6.8.0-11-generic 6.8.0-11.11
  ProcVersionSignature: Ubuntu 6.8.0-11.11-generic 6.8.0-rc4
  Uname: Linux 6.8.0-11-generic x86_64
  NonfreeKernelModules: zfs
  ApportVersion: 2.28.0-0ubuntu1
  Architecture: amd64
  CRDA: N/A
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Mar  7 05:23:23 2024
  InstallationDate: Installed on 2024-02-02 (34 days ago)
  InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Daily amd64 (20240123)
  MachineType: Framework Laptop 13 (AMD Ryzen 7040Series)
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  ProcFB: 0 amdgpudrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-11-generic 
root=UUID=8de457ce-abc8-47cf-a43f-c13183977aa5 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-6.8.0-11-generic N/A
   linux-backports-modules-6.8.0-11-generic  N/A
   linux-firmware                            20240202.git36777504-0ubuntu1
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/17/2023
  dmi.bios.release: 3.3
  dmi.bios.vendor: INSYDE Corp.
  dmi.bios.version: 03.03
  dmi.board.asset.tag: *
  dmi.board.name: FRANMDCP07
  dmi.board.vendor: Framework
  dmi.board.version: A7
  dmi.chassis.asset.tag: FRANDGCPA735010072
  dmi.chassis.type: 10
  dmi.chassis.vendor: Framework
  dmi.chassis.version: A7
  dmi.modalias: 
dmi:bvnINSYDECorp.:bvr03.03:bd10/17/2023:br3.3:svnFramework:pnLaptop13(AMDRyzen7040Series):pvrA7:rvnFramework:rnFRANMDCP07:rvrA7:cvnFramework:ct10:cvrA7:skuFRANDGCP07:
  dmi.product.family: Laptop
  dmi.product.name: Laptop 13 (AMD Ryzen 7040Series)
  dmi.product.sku: FRANDGCP07
  dmi.product.version: A7
  dmi.sys.vendor: Framework

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