Groups > linux.debian.kernel > #89181 > unrolled thread

Bug#1114912: linux-image-amd64: KVM GPU passthrough causes kernel crash and system hang on Debian 13 after VM shutdown

Started by	Naunte <dec01-2021@hotmail.com>
First post	2025-09-11 16:30 +0200
Last post	2025-09-22 15:00 +0200
Articles	2 — 2 participants

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  Bug#1114912: linux-image-amd64: KVM GPU passthrough causes kernel crash and system hang on Debian 13 after VM shutdown Naunte <dec01-2021@hotmail.com> - 2025-09-11 16:30 +0200
    Bug#1114912: linux-image-amd64: KVM GPU passthrough causes kernel crash and system hang on Debian 13 after VM shutdown Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2025-09-22 15:00 +0200

#89181 — Bug#1114912: linux-image-amd64: KVM GPU passthrough causes kernel crash and system hang on Debian 13 after VM shutdown

From	Naunte <dec01-2021@hotmail.com>
Date	2025-09-11 16:30 +0200
Subject	Bug#1114912: linux-image-amd64: KVM GPU passthrough causes kernel crash and system hang on Debian 13 after VM shutdown
Message-ID	<LtQtb-exlU-1@gated-at.bofh.it>

Package: linux-image-amd64
Version: 6.16.5-1
Severity: important
X-Debbugs-Cc: dec01-2021@hotmail.com

Dear Maintainer,

I configured AMD RX-7900XTX GPU passthrough to a KVM virtual machine running Windows 10 on Debian 13.1.0. 

After shutting down the Windows 10 VM, the Linux host kernel reports errors related to vfio_pci and AMD GPU passthrough.

This causes virt-manager to freeze and become unresponsive; virsh commands also hang. The GPU fails to reset, and rebooting the host system often hangs, requiring a forced reboot via hardware reset or power off.

Previously, on Debian 12.12.0 with the same hardware and GPU passthrough setup, no such issues occurred; the GPU reset properly every time.

I expected the VM shutdown to complete cleanly without freezing host control tools or causing kernel crashes, and for the GPU to reset so it could be reused without reboot.

I have also tested kernels from Debian testing (linux-image-6.16.3+deb14-amd6) and unstable (linux-image-6.16.5+deb14-amd64) branches, but the same errors occur.

-- PC Setup:
GPU: AMD RX 7900XTX
Motherboard: Asus TUF GAMING Z890-PLUS WIFI
CPU: Intel Ultra 7 265K
Host OS: Debian 13.1 with kernel 6.12.43
Virtualization: KVM/QEMU

-- System Information:
Debian Release: 13.1
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'unstable'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.43+deb13-amd64 (SMP w/20 CPU threads; PREEMPT)
Kernel taint flags: TAINT_DIE
Locale: LANG=en_SG.UTF-8, LC_CTYPE=en_SG.UTF-8 (charmap=UTF-8), LANGUAGE=en_SG:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages linux-image-amd64 depends on:
ii  linux-image-6.16.5+deb14-amd64  6.16.5-1

linux-image-amd64 recommends no packages.

linux-image-amd64 suggests no packages.

-- no debconf information



-- PCI devices:
00:00.0 Host bridge [0600]: Intel Corporation Device [8086:7d1b] (rev 01)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
00:02.0 VGA compatible controller [0300]: Intel Corporation Arrow Lake-S [Intel Graphics] [8086:7d67] (rev 06)
	DeviceName: Onboard IGD
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: i915
	Kernel modules: i915, xe
00:04.0 Signal processing controller [1180]: Intel Corporation Device [8086:ad03] (rev 01)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: proc_thermal_pci
	Kernel modules: processor_thermal_device_pci
00:06.0 PCI bridge [0604]: Intel Corporation Device [8086:ae4d] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: pcieport
00:08.0 System peripheral [0880]: Intel Corporation Device [8086:ae4c] (rev 10)
	DeviceName: Intel GNA Device
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
00:0a.0 Signal processing controller [1180]: Intel Corporation Device [8086:ad0d] (rev 01)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: intel_vsec
	Kernel modules: intel_vsec
00:0b.0 Processing accelerators [1200]: Intel Corporation Arrow Lake NPU [8086:ad1d] (rev 01)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: intel_vpu
	Kernel modules: intel_vpu
00:14.0 RAM memory [0500]: Intel Corporation Device [8086:ae7f] (rev 10)
	DeviceName: USB Controller
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: intel_pmc_ssram_telemetry
	Kernel modules: intel_pmc_ssram_telemetry
00:1f.0 ISA bridge [0601]: Intel Corporation Device [8086:ae0d] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
00:1f.5 Serial bus controller [0c80]: Intel Corporation Device [8086:ae23] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
01:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Upstream Port of PCI Express Switch [1002:1478] (rev 10)
	Kernel driver in use: pcieport
02:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Downstream Port of PCI Express Switch [1002:1479] (rev 10)
	Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 XL Downstream Port of PCI Express Switch [1002:1479]
	Kernel driver in use: pcieport
03:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 31 [Radeon RX 7900 XT/7900 XTX/7900 GRE/7900M] [1002:744c] (rev c8)
	Subsystem: XFX Limited RX-79XMERCB9 [SPEEDSTER MERC 310 RX 7900 XTX] [1eae:7901]
	Kernel modules: amdgpu
03:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 31 HDMI/DP Audio [1002:ab30]
	Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Navi 31 HDMI/DP Audio [1002:ab30]
	Kernel driver in use: vfio-pci
	Kernel modules: snd_hda_intel
80:14.0 USB controller [0c03]: Intel Corporation Device [8086:7f6e] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci_pci
80:14.5 Non-VGA unclassified device [0000]: Intel Corporation Device [8086:7f2f] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
80:15.0 Serial bus controller [0c80]: Intel Corporation Device [8086:7f4c] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
80:15.2 Serial bus controller [0c80]: Intel Corporation Device [8086:7f4e] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
80:15.3 Serial bus controller [0c80]: Intel Corporation Device [8086:7f4f] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
80:16.0 Communication controller [0780]: Intel Corporation Device [8086:7f68] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: mei_me
	Kernel modules: mei_me
80:17.0 SATA controller [0106]: Intel Corporation Device [8086:7f62] (rev 10)
	DeviceName: SATA Controller
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: ahci
	Kernel modules: ahci
80:1b.0 PCI bridge [0604]: Intel Corporation Device [8086:7f40] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: pcieport
80:1c.0 PCI bridge [0604]: Intel Corporation Device [8086:7f38] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: pcieport
80:1c.2 PCI bridge [0604]: Intel Corporation Device [8086:7f3a] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: pcieport
80:1c.3 PCI bridge [0604]: Intel Corporation Device [8086:7f3b] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: pcieport
80:1d.0 PCI bridge [0604]: Intel Corporation Device [8086:7f30] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: pcieport
80:1f.0 ISA bridge [0601]: Intel Corporation Device [8086:7f04] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
80:1f.3 Audio device [0403]: Intel Corporation Device [8086:7f50] (rev 10)
	DeviceName: Intel HD Audio
	Subsystem: ASUSTeK Computer Inc. Device [1043:886d]
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel, snd_sof_pci_intel_mtl
80:1f.4 SMBus [0c05]: Intel Corporation Device [8086:7f23] (rev 10)
	DeviceName: SMBus Controller
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
	Kernel driver in use: i801_smbus
	Kernel modules: i2c_i801
80:1f.5 Serial bus controller [0c80]: Intel Corporation Device [8086:7f24] (rev 10)
	Subsystem: ASUSTeK Computer Inc. Device [1043:88ef]
83:00.0 Network controller [0280]: MEDIATEK Corp. Device [14c3:7925]
	Subsystem: AzureWave Device [1a3b:6000]
	Kernel driver in use: mt7925e
	Kernel modules: mt7925e
84:00.0 Ethernet controller [0200]: Intel Corporation Ethernet Controller I226-V [8086:125c] (rev 06)
	DeviceName: Intel I226-V LAN
	Subsystem: ASUSTeK Computer Inc. Device [1043:8867]
	Kernel driver in use: igc
	Kernel modules: igc


-- Snippets from my KVM config:
  <os>
    <type arch='x86_64' machine='pc-q35-7.2'>hvm</type>
    <boot dev='hd'/>
  </os>

  <features>
    <acpi/>
    <apic/>
    <hyperv mode='custom'>
      <relaxed state='on'/>
      <vapic state='on'/>
      <spinlocks state='on' retries='8191'/>
      <vendor_id state='on' value='1234567890ab'/>
    </hyperv>
    <kvm>
      <hidden state='on'/>
    </kvm>
    <vmport state='off'/>
  </features>

  <cpu mode='host-passthrough' check='none' migratable='on'>
    <topology sockets='1' dies='1' clusters='1' cores='4' threads='2'/>
    <feature policy='disable' name='hypervisor'/>
  </cpu>

    <hostdev mode='subsystem' type='pci' managed='yes'>
      <source>
        <address domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
      </source>
      <rom file='/usr/share/qemu/7900xtx.rom'/>
      <address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
    </hostdev>

    <hostdev mode='subsystem' type='pci' managed='yes'>
      <source>
        <address domain='0x0000' bus='0x03' slot='0x00' function='0x1'/>
      </source>
      <address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
    </hostdev>

-- Logs: dmesg -l err
[   55.221506] vfio-pci 0000:03:00.0: amdgpu: failed to clear page tables on GEM object close (-19)
[   55.221509] vfio-pci 0000:03:00.0: amdgpu: leaking bo va (-19)
[   55.221519] vfio-pci 0000:03:00.0: amdgpu: failed to clear page tables on GEM object close (-19)
[   55.221520] vfio-pci 0000:03:00.0: amdgpu: leaking bo va (-19)
[   55.221522] vfio-pci 0000:03:00.0: amdgpu: failed to clear page tables on GEM object close (-19)
[   55.221522] vfio-pci 0000:03:00.0: amdgpu: leaking bo va (-19)
[   55.221527] vfio-pci 0000:03:00.0: amdgpu: failed to clear page tables on GEM object close (-19)
[   55.221528] vfio-pci 0000:03:00.0: amdgpu: leaking bo va (-19)
[   55.221531] vfio-pci 0000:03:00.0: amdgpu: failed to clear page tables on GEM object close (-19)
[   55.221531] vfio-pci 0000:03:00.0: amdgpu: leaking bo va (-19)
[   55.221533] vfio-pci 0000:03:00.0: amdgpu: failed to clear page tables on GEM object close (-19)
[   55.221533] vfio-pci 0000:03:00.0: amdgpu: leaking bo va (-19)
[   55.221535] vfio-pci 0000:03:00.0: amdgpu: failed to clear page tables on GEM object close (-19)
[   55.221536] vfio-pci 0000:03:00.0: amdgpu: leaking bo va (-19)
[   55.221537] vfio-pci 0000:03:00.0: amdgpu: failed to clear page tables on GEM object close (-19)
[   55.221538] vfio-pci 0000:03:00.0: amdgpu: leaking bo va (-19)


-- Logs: dmesg -l warn
[  123.450266] Oops: Oops: 0002 [#1] PREEMPT SMP NOPTI
[  123.450275] CPU: 1 UID: 0 PID: 901 Comm: kworker/1:2 Not tainted 6.12.43+deb13-amd64 #1  Debian 6.12.43-1
[  123.450284] Hardware name: ASUS System Product Name/TUF GAMING Z890-PLUS WIFI, BIOS 2207 07/18/2025
[  123.450288] Workqueue: pm pm_runtime_work
[  123.450301] RIP: 0010:down_write+0x20/0x60
[  123.450311] Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 53 48 89 fb e8 1e bd ff ff 65 ff 05 7f 37 13 6a 31 c0 ba 01 00 00 00 <f0> 48 0f b1 13 75 26 65 48 8b 05 61 37 13 6a 48 89 43 08 65 ff 0d
[  123.450318] RSP: 0018:ffffb6eec0ce3d38 EFLAGS: 00010246
[  123.450325] RAX: 0000000000000000 RBX: 0000000000000520 RCX: 0000000000000017
[  123.450331] RDX: 0000000000000001 RSI: ffff8f660241f0c8 RDI: 0000000000000520
[  123.450335] RBP: 0000000000000520 R08: 0000000000000000 R09: ffff8f6601812ac0
[  123.450339] R10: 0000000000000003 R11: 0000000000000000 R12: ffffffffc0eb5380
[  123.450343] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8f6610de4d40
[  123.450347] FS:  0000000000000000(0000) GS:ffff8f753fc80000(0000) knlGS:0000000000000000
[  123.450352] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.450357] CR2: 0000000000000520 CR3: 000000075c622004 CR4: 0000000000f72ef0
[  123.450363] PKRU: 55555554
[  123.450367] Call Trace:
[  123.450373]  <TASK>
[  123.450384]  vfio_pci_core_runtime_suspend+0x1e/0x70 [vfio_pci_core]
[  123.450407]  pci_pm_runtime_suspend+0x67/0x1a0
[  123.450418]  ? __pfx_pci_pm_runtime_suspend+0x10/0x10
[  123.450427]  __rpm_callback+0x41/0x170
[  123.450435]  ? __pfx_pci_pm_runtime_suspend+0x10/0x10
[  123.450444]  rpm_callback+0x55/0x60
[  123.450451]  ? __pfx_pci_pm_runtime_suspend+0x10/0x10
[  123.450459]  rpm_suspend+0xe6/0x5f0
[  123.450465]  ? __wake_up+0x44/0x60
[  123.450474]  pm_runtime_work+0x84/0xb0
[  123.450482]  process_one_work+0x174/0x330
[  123.450493]  worker_thread+0x251/0x390
[  123.450503]  ? __pfx_worker_thread+0x10/0x10
[  123.450511]  kthread+0xcf/0x100
[  123.450517]  ? __pfx_kthread+0x10/0x10
[  123.450523]  ret_from_fork+0x31/0x50
[  123.450531]  ? __pfx_kthread+0x10/0x10
[  123.450536]  ret_from_fork_asm+0x1a/0x30
[  123.450546]  </TASK>
[  123.450549] Modules linked in: bridge stp llc bonding tls nft_chain_nat nf_nat nft_limit xt_multiport xt_tcpudp xt_LOG nf_log_syslog xt_limit xt_recent xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat nf_tables binfmt_misc xe drm_gpuvm snd_hda_codec_realtek snd_hda_codec_generic snd_hda_scodec_component nls_ascii nls_cp437 vfat fat snd_sof_pci_intel_mtl snd_sof_intel_hda_generic amdgpu soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda_common intel_uncore_frequency intel_uncore_frequency_common intel_pmc_core snd_soc_hdac_hda snd_sof_intel_hda_mlink snd_sof_intel_hda snd_hda_codec_hdmi x86_pkg_temp_thermal intel_powerclamp snd_sof_pci snd_sof_xtensa_dsp coretemp snd_sof mt7925e kvm_intel mt7925_common snd_sof_utils snd_hda_ext_core mt792x_lib snd_soc_acpi_intel_match mt76_connac_lib snd_soc_acpi kvm snd_soc_core mt76 i915 snd_compress mac80211 snd_pcm_dmaengine crct10dif_pclmul btusb ghash_clmulni_intel soundwire_bus btrtl sha512_ssse3 btintel sha256_ssse3 snd_hda_intel
[  123.450675]  libarc4 sha1_ssse3 btbcm aesni_intel snd_intel_dspcfg amdxcp btmtk drm_exec snd_intel_sdw_acpi gf128mul cfg80211 snd_hda_codec crypto_simd gpu_sched cryptd bluetooth drm_buddy drm_suballoc_helper snd_hda_core drm_display_helper processor_thermal_device_pci processor_thermal_device intel_vpu snd_hwdep processor_thermal_wt_hint rapl snd_pcm intel_cstate cec processor_thermal_rfim eeepc_wmi intel_rapl_msr processor_thermal_rapl rc_core asus_wmi drm_ttm_helper intel_rapl_common snd_timer mei_gsc_proxy drm_shmem_helper ttm pmt_telemetry snd platform_profile mei_me processor_thermal_wt_req intel_uncore pmt_class i2c_algo_bit drm_kms_helper battery processor_thermal_power_floor mei spd5118 soundcore processor_thermal_mbox rfkill evdev joydev int340x_thermal_zone wmi_bmof intel_hid intel_vsec int3400_thermal sg acpi_thermal_rel acpi_tad sparse_keymap button acpi_pad vfio_pci vfio_pci_core irqbypass vfio_iommu_type1 vfio vhost_net tun drm vhost vhost_iotlb tap configfs efi_pstore nfnetlink ip_tables x_tables
[  123.450795]  autofs4 ext4 crc16 mbcache jbd2 btrfs blake2b_generic raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 md_mod dm_snapshot dm_bufio dm_mod hid_generic usbhid hid sd_mod ahci libahci libata xhci_pci xhci_hcd iTCO_wdt intel_pmc_bxt scsi_mod iTCO_vendor_support watchdog usbcore igc i2c_i801 intel_lpss_pci crc32_pclmul i2c_smbus scsi_common crc32c_intel intel_lpss video usb_common idma64 wmi pinctrl_meteorpoint fan pinctrl_meteorlake efivarfs
[  123.450878] CR2: 0000000000000520
[  123.450883] ---[ end trace 0000000000000000 ]---
[  123.510058] kauditd_printk_skb: 2 callbacks suppressed
[  123.550933] RIP: 0010:down_write+0x20/0x60
[  123.550935] Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 53 48 89 fb e8 1e bd ff ff 65 ff 05 7f 37 13 6a 31 c0 ba 01 00 00 00 <f0> 48 0f b1 13 75 26 65 48 8b 05 61 37 13 6a 48 89 43 08 65 ff 0d
[  123.550936] RSP: 0018:ffffb6eec0ce3d38 EFLAGS: 00010246
[  123.550937] RAX: 0000000000000000 RBX: 0000000000000520 RCX: 0000000000000017
[  123.550938] RDX: 0000000000000001 RSI: ffff8f660241f0c8 RDI: 0000000000000520
[  123.550939] RBP: 0000000000000520 R08: 0000000000000000 R09: ffff8f6601812ac0
[  123.550939] R10: 0000000000000003 R11: 0000000000000000 R12: ffffffffc0eb5380
[  123.550940] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8f6610de4d40
[  123.550940] FS:  0000000000000000(0000) GS:ffff8f753fc80000(0000) knlGS:0000000000000000
[  123.550941] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.550942] CR2: 0000000000000520 CR3: 00000001052c2006 CR4: 0000000000f72ef0
[  123.550943] PKRU: 55555554
[  141.071627] kauditd_printk_skb: 5 callbacks suppressed
[  147.082008] kauditd_printk_skb: 59 callbacks suppressed

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#89352

From	Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Date	2025-09-22 15:00 +0200
Message-ID	<LxOj7-hjxi-15@gated-at.bofh.it>
In reply to	#89181

[Multipart message — attachments visible in raw view] — view raw

Hello,

On Thu, Sep 11, 2025 at 10:25:59PM +0800, Naunte wrote:
> I configured AMD RX-7900XTX GPU passthrough to a KVM virtual machine running Windows 10 on Debian 13.1.0. 
> 
> After shutting down the Windows 10 VM, the Linux host kernel reports errors related to vfio_pci and AMD GPU passthrough.
> 
> This causes virt-manager to freeze and become unresponsive; virsh
> commands also hang. The GPU fails to reset, and rebooting the host
> system often hangs, requiring a forced reboot via hardware reset or
> power off.

Can you please provide a full bootlog?

Also can you please provide the output of:

	ls -l /sys/devices/pci0000:00/0000:03:00.0/driver

when run a) before kvm starts, b) while kvm is running and c) after the
problem triggered?

I suspect that somehow there are two different threads that access
the hardware: Both vfio_pci and the amdgpu driver. I guess before you
start kvm, the amdgpu driver is loaded already. Does it help to
blacklist it (i.e. pass

	module_blacklist=amdgpu

on the kernel commandline and verify using

	lsmod | grep amdgpu

that the module isn't loaded before kvm is started.)

Not knowing how pci passthrough works exactly, I'd expect that the host
driver is unbound when kvm is started with a passed through pci device.
So if the above helps the likely problem is that the amdgpu fails to
completely free all resources.

Does it produce any kernel or shell output if you do:

	echo 0000:03:00.0 > /sys/bus/pci/drivers/amdgpu/unbind
	echo 0000:03:00.0 > /sys/bus/pci/drivers/amdgpu/bind

instead of/before starting kvm?

Best regards
Uwe

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Bug#1114912: linux-image-amd64: KVM GPU passthrough causes kernel crash and system hang on Debian 13 after VM shutdown

Contents

#89181 — Bug#1114912: linux-image-amd64: KVM GPU passthrough causes kernel crash and system hang on Debian 13 after VM shutdown

#89352