RTX 5080 (GB203): Random Xid 79 with zero precursor — any load level, instant atomic GPU death, open kernel module 595.71.05

### NVIDIA Open GPU Kernel Modules Version kmod-nvidia-595.71.05-1.fc44.x86_64 ### Please confirm this issue does not happen with the proprietary driver (of the same version). This issue tracker is only for bugs specific to the open kernel driver. - [ ] I confirm that this does not happen with the proprietary driver package. ### Operating System and Version Bazzite ### Kernel Release Linux bazzite 6.19.14 ### Please confirm you are running a stable release kernel (e.g. not a -rc). We do not accept bug reports for unreleased kernels. - [x] I am running on a stable kernel release. ### Hardware: GPU NVIDIA GeForce RTX 5080 ### Describe the bug #### Symptom Random Xid 79 (GPU has fallen off the bus) at completely unpredictable intervals — minutes to 9+ hours after boot. Reproducible under: - Heavy Vulkan/Proton gaming (Diablo IV) - Light/indie gaming (Hyper Light Drifter) - Desktop idle with only Spotify running - Locked screen with no active GPU workload Crash presents as black screen + audio artifacts. Wayland compositor collapses. Hard reboot required. #### Key log — Xid 79 with zero precursor ``` May 18 19:02:39 kernel: NVRM: GPU at PCI:0000:2b:00: GPU-0b11d014-1685-04bd-26ed-5fc0bc1c44ae May 18 19:02:39 kernel: NVRM: Xid (PCI:0000:2b:00): 79, GPU has fallen off the bus. May 18 19:02:39 kernel: NVRM: GPU 0000:2b:00.0: GPU has fallen off the bus. May 18 19:02:39 kernel: NVRM: krcRcAndNotifyAllChannels_IMPL: RC all channels for critical error 79. May 18 19:02:39 kernel: NVRM: _threadNodeCheckTimeout: API_GPU_ATTACHED_SANITY_CHECK failed! [x35 repetitions] May 18 19:02:47 kernel: NVRM: GPU0 _issueRpcAndWait: rpcSendMessage failed with status 0x0000000f for fn 10 sequence 137124 [cascade of GspRmFree failures with status=0x0000000f] May 18 19:02:47 kernel: nvidia-modeset: ERROR: GPU:0: Failed detecting connected display devices ``` **Zero kernel events in the 10 seconds before 19:02:39**. No AER errors anywhere in the boot. The GPU disappears atomically with no software-visible trigger. In a different boot the same crash was preceded only by 9+ hours of clean operation (last NVIDIA log entry was Steam GPU detection at session start). #### What has been ruled out | Fix attempted | Result | |---|---| | NVreg_EnableGpuFirmware=0 | Ignored — open module on Blackwell enforces GSP | | pcie_aspm=off kernel arg | No effect | | PCIe Gen 3 forced in BIOS | No effect | | GPU power limit 300W (nvidia-smi -pl 300) | No effect | | nvidia-persistenced + min clock lock (500 MHz floor) | No effect | | PCIe AER hardware errors | None present — physical link never drops | #### Additional observations - nvidia-powerd exits at boot with ERROR! Running on an unsupported system (PCI device Id: 0x2c02) — RTX 5080 is absent from its supported device list, leaving Dynamic Boost entirely unmanaged - No Xid other than 79 has ever appeared - The failure mode matches issue #1080 (GB202, GSP silent death under Proton/Vulkan) but extends to near-zero GPU load, suggesting the GSP firmware on GB20x can die spontaneously regardless of command queue pressure - status=0x0000000f (NV_ERR_GPU_NOT_FULL_POWER) in all post-crash GspRmFree calls > The crash also occurs on Windows 11 with the official NVIDIA Windows driver — identical black screen + hard reboot required. The issue is absent on an RTX 2070 in the same system (same slot, same PSU, same everything), confirming this is specific to the RTX 5080 (GB203/Blackwell) and not an environment issue. ### To Reproduce 1. Use the system normally or leave it idle 2. After an unpredictable interval (minutes to 9+ hours), Xid 79 fires with no preceding warning — display goes black, hard reboot required Notes: - There is no reliable on-demand trigger — the crash occurs under any load level including near-zero (locked screen, Spotify in background) - Crash does not reproduce on RTX 2070 in the same system (same slot, PSU, and motherboard), confirming the issue is specific to GB203/Blackwell silicon or this GPU's GSP firmware - Zero kernel events precede the Xid 79 — the GPU vanishes atomically with no AER errors, no GSP heartbeat timeout log, and no PCIe link drop ### Bug Incidence Always ### nvidia-bug-report.log.gz [nvidia-bug-report.log.gz](https://github.com/user-attachments/files/27969991/nvidia-bug-report.log.gz) ### More Info _No response_