[Bug 2141216] Re: Suspend/resume broken after latest Ubuntu update on AMD RX 960 XT (andgpu SMU resume failure)

Mario:
1) I don't manually track individual updates, I usually accept the "update now" option and assume all will be well. I checked /var/log/apt/history.log and recent updates appear to be package/kernel updates and not firmware. I will attach a copy from the time period where this issue came up. My best guess is its the update from the 6th but cannot say for sure. My current kernel is:
mike-cooper@Max:~$ uname -a
Linux Max 6.17.0-14-generic #14-Ubuntu SMP PREEMPT_DYNAMIC Fri Jan 9 17:01:16 UTC 2026 x86_64 GNU/Linux

2) When I first noticed the suspend/resume problem I didn't think of
making a bug report, but sought advice from an AI bot who suggested I
disable deep sleep. I sudo nano'd my way into /etc/default/grub and made
the change the AI proposed. That didn't fix the problem, and may have
exacerbated it, but it didn't cause it either because it already
existed. I can change back to: GRUB_CMDLINE_LINUX_DEFAULT="quiet
splash" and force another suspend it you think that's the right thing to
do.

** Attachment added: "history.log.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2141216/+attachment/5946166/+files/history.log.txt

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https://bugs.launchpad.net/bugs/2141216

Title:
Suspend/resume broken after latest Ubuntu update on AMD RX 960 XT
(andgpu SMU resume failure)

Status in linux package in Ubuntu:
New
Status in linux source package in Questing:
Triaged

Bug description:
Summary: Suspend/resume broken after latest Ubuntu update on AMD RX
What Happens: After suspend, system wakes but display remains black. VT switching (Ctrl–Alt–F3) does not work. Only hard reboot recovers.
Regression: This started immediately after a recent Ubuntu update
Hardware: AMD RX 960 XT (Nav 44) + AMD Raphael iGPU
Relevant logs: SMU resume failure. GPU ring timeouts, GPU ring timeouts, devcoredump created (already captured by ubuntu-bug tool)

ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: linux-image-6.17.0-12-generic 6.17.0-12.12
ProcVersionSignature: Ubuntu 6.17.0-12.12-generic 6.17.2
Uname: Linux 6.17.0-12-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sat Feb 7 17:54:17 2026
InstallationDate: Installed on 2025-10-20 (110 days ago)
InstallationMedia: Ubuntu 25.10 "Questing Quokka" - Release amd64 (20251007)
MachineType: ASUS System Product Name
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=/boot/vmlinuz-6.17.0-12-generic root=UUID=3412c7b3-e116-4927-b603-3da7641a647b ro quiet splash mem_sleep_default=s2idle crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M vt.handoff=7
RelatedPackageVersions:
firmware-sof N/A
linux-firmware 20250901.git993ff19b-0ubuntu1.6
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/11/2025
dmi.bios.release: 32.65
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3265
dmi.board.asset.tag: Default string
dmi.board.name: TUF GAMING B650E-E WIFI
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3265:bd06/11/2025:br32.65:svnASUS:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnTUFGAMINGB650E-EWIFI:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:skuSKU:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: ASUS

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