Subject: Bug#1146343: RX480 RustDesk VCE regression bisection result
Hi Salvatore,
I completed the requested bisection between stable v6.12.101 and
v6.12.105 on the affected machine.
The kernel configuration was derived on the affected work-box while it
was running Debian 6.12.101 using the requested localmodconfig /
savedefconfig procedure. I froze that my_defconfig and used it for every
build. Compilation and packaging occurred on a separate amd64 builder;
every GOOD/BAD classification came only from the work-box with its
RX480/Polaris10 GPU under real RustDesk H.264 VAAPI use.
The endpoints reproduced as follows:
v6.12.101 GOOD
v6.12.105 BAD
The complete git bisect log is attached. Git mechanically identified:
52566c150cadb1a17df840dd25862a61dcf84bed is the first bad commit
drm/amdgpu: check ASPM on the dGPU host link
Its immediate parent, fa9624ad4d6d4b25e448dbc550ddc69e6f849640, tested
GOOD during the bisection. I subsequently qualified that exact parent in
two real RustDesk H.264 VAAPI sessions totalling about 43 minutes,
including a deliberate disconnect/reconnect. All 288 periodic samples
and the complete kernel journal were free of the characteristic
timeout/reset signatures. It is now the pinned operational kernel on
this work-box, and two consecutive normal boots plus a further 10-minute
H.264 VAAPI canary were clean.
There is an important causal qualification. I also built a clean
v6.12.105 tree with only 52566c150cad... reverted. That kernel remained
BAD: after about 79 seconds of real RustDesk H.264 VAAPI activity, the
work-box reproduced the same sequence:
ring vce0 timeout
GPU reset begin!
VRAM is lost due to GPU reset!
Therefore, the mechanical bisection boundary is established, but this
single revert did not establish that 52566c... alone is sufficient for
the full v6.12.105 regression. There may be an interaction with other
changes in the later tree, or the isolated revert may be insufficient; I
do not want to overstate the mechanism.
The captured PCI topology appears to place the RX480 directly behind
Intel root port 0000:00:01.0; I did not observe an AMD internal PCIe
switch in the path. That seems relevant to reviewing the patch's effect
on this hardware. I have not run the optional one-shot amdgpu.aspm=0
mechanism probe.
For operational containment, I also directly qualified exact stable
v6.12.103 with the same frozen work-box-derived configuration. It
completed about 26 minutes of real RustDesk H.264 VAAPI activity across
three sessions with two reconnects, 174/174 clean samples, a clean
complete journal and stable visuals. Exact v6.12.103 is retained as the
emergency fallback and Debian 6.12.101 as a secondary rescue.
For the initial review I have included the complete bisect log, frozen
defconfig, the full first-bad commit metadata/diff, compact PCI
topology, a concise result summary, and short characteristic-signature
extracts from both the v6.12.105 BAD endpoint and the v6.12.105
single-revert BAD test. Full journals, package/build hashes, detailed
topology, and complete evidence manifests are available if useful.
Regards,
Manuel
On 9/1/2026 4:00 PM, Salvatore Bonaccorso wrote:
Hi Manuel, all
On Tue, Sep 01, 2026 at 06:52:55AM +0200, Salvatore Bonaccorso wrote:
Control: tags -1 + moreinfo
Hi,
On Mon, Aug 31, 2026 at 10:41:47AM -0500, Manuel R. Buffa wrote:
Package: src:linux
Version: 6.12.107-1
Severity: important
X-Debbugs-Cc: [email protected]
Dear Maintainer,
I am reporting a reproducible amdgpu/VCE regression on Debian 13 (trixie)
with an AMD Radeon RX 480 / Polaris10 GPU. Active RustDesk remote-control
sessions are stable on Debian kernel 6.12.101-1 but trigger a VCE ring timeout
and GPU reset on 6.12.105-1 and 6.12.107-1.
[...]
As you can reproduce your issue reliably, please bisect the changes
between 6.12.101 and 6.12.105 to identify the breaking commit. That
given we can have a look if it is a known regression already or needs
to be reported upstream yet.
Let me know if you need instructions for the bisecting steps!
Manuel asked off-bug about the instructions, so here we go. To bisect
between 6.12.101 and 6.12.105 proceed as follows (once you have the
my_config, compilation could be as well on a more powerful machine).
git clone --single-branch -b linux-6.12.y
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
cd linux-stable
git checkout v6.12.101
cp /boot/config-$(uname -r) .config
yes '' | make localmodconfig
make savedefconfig
mv defconfig arch/x86/configs/my_defconfig
# test 6.12.101 to ensure this is "good"
make my_defconfig
make -j $(nproc) bindeb-pkg
... install the resulting .deb package and confirm problem does not exist
# test 6.12.105 to ensure this is "bad"
git checkout v6.12.105
make my_defconfig
make -j $(nproc) bindeb-pkg
... install the resulting .deb package and confirm problem exists
With that confirmed, the bisection can start:
git bisect start
git bisect good v6.12.101
git bisect bad v6.12.105
In each bisection step git checks out a state between the oldest
known-bad and the newest known-good commit. In each step test using:
make my_defconfig
make -j $(nproc) bindeb-pkg
... install, verify if problem exists
and if the problem is hit run:
git bisect bad
and if the problem doesn't trigger run:
git bisect good
. Please pay attention to always select the just built kernel for
booting, it won't always be the default kernel picked up by grub.
Iterate until git announces to have identified the first bad commit.
Then provide the output of
git bisect log
In the course of the bisection you might have to uninstall previous
kernels again to not exhaust the disk space in /boot. Also in the end
uninstall all self-built kernels again.
Regards,
Salvatore
2026-09-04T12:01:09-05:00 work-box kernel: amdgpu 0000:01:00.0: amdgpu: ring
vce0 timeout, signaled seq=63, emitted seq=64
2026-09-04T12:01:09-05:00 work-box kernel: amdgpu 0000:01:00.0: amdgpu: GPU
reset begin!
2026-09-04T12:01:14-05:00 work-box kernel: amdgpu 0000:01:00.0: amdgpu: GPU
reset succeeded, trying to resume
2026-09-04T12:01:14-05:00 work-box kernel: [drm] VRAM is lost due to GPU reset!
2026-09-04T12:01:14-05:00 work-box kernel: amdgpu 0000:01:00.0: amdgpu: GPU
reset(1) succeeded!
commit 52566c150cadb1a17df840dd25862a61dcf84bed
Author: Yang Wang <[email protected]>
AuthorDate: Wed Aug 5 20:39:18 2026 +0800
Commit: Greg Kroah-Hartman <[email protected]>
CommitDate: Sun Aug 23 14:22:41 2026 +0200
drm/amdgpu: check ASPM on the dGPU host link
commit 2a9c5154a5650c09ad44ff5e1dff74754e15a3c6 upstream.
dGPUs with an internal PCIe switch expose graphics functions below the
switch downstream port. The automatic ASPM check uses the display
endpoint and evaluates the internal link instead of the host link.
Use the switch upstream port for the check and report the selected
link.
Fixes: 0ab5d711ec74 ("drm/amd: Refactor `amdgpu_aspm` to be evaluated per
device")
Signed-off-by: Yang Wang <[email protected]>
Reviewed-by: Hawking Zhang <[email protected]>
Reviewed-by: Kenneth Feng <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
(cherry picked from commit 4e0d6f2876e704fff707b18c40dbd383aea4a1c9)
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 50 +++++++++++++++++++++++++++++-
1 file changed, 49 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 2ec994a6dea6..20a13db7cd88 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1806,6 +1806,31 @@ static bool amdgpu_device_aspm_support_quirk(struct
amdgpu_device *adev)
#endif
}
+/*
+ * Some dGPUs expose their display endpoint below an internal PCIe switch.
+ * Use the switch upstream port to query the host-facing link.
+ */
+static struct pci_dev *amdgpu_device_get_aspm_pdev(struct amdgpu_device *adev)
+{
+ struct pci_dev *swds, *swus;
+
+ swds = pci_upstream_bridge(adev->pdev);
+ if (!swds ||
+ (swds->vendor != PCI_VENDOR_ID_ATI &&
+ swds->vendor != PCI_VENDOR_ID_AMD) ||
+ pci_pcie_type(swds) != PCI_EXP_TYPE_DOWNSTREAM)
+ return adev->pdev;
+
+ swus = pci_upstream_bridge(swds);
+ if (!swus ||
+ (swus->vendor != PCI_VENDOR_ID_ATI &&
+ swus->vendor != PCI_VENDOR_ID_AMD) ||
+ pci_pcie_type(swus) != PCI_EXP_TYPE_UPSTREAM)
+ return adev->pdev;
+
+ return swus;
+}
+
/**
* amdgpu_device_should_use_aspm - check if the device should program ASPM
*
@@ -1818,6 +1843,9 @@ static bool amdgpu_device_aspm_support_quirk(struct
amdgpu_device *adev)
*/
bool amdgpu_device_should_use_aspm(struct amdgpu_device *adev)
{
+ struct pci_dev *aspm_pdev, *parent;
+ bool enabled;
+
switch (amdgpu_aspm) {
case -1:
break;
@@ -1832,7 +1860,27 @@ bool amdgpu_device_should_use_aspm(struct amdgpu_device
*adev)
return false;
if (amdgpu_device_aspm_support_quirk(adev))
return false;
- return pcie_aspm_enabled(adev->pdev);
+
+ /*
+ * pcie_aspm_enabled() checks the link between its argument and
+ * the immediate upstream bridge. Use SWUS for dGPUs with an
+ * internal switch so that this is the host-facing link.
+ */
+ aspm_pdev = amdgpu_device_get_aspm_pdev(adev);
+ parent = pci_upstream_bridge(aspm_pdev);
+ if (!parent) {
+ dev_dbg(adev->dev, "ASPM: no upstream PCIe link for %s\n",
+ pci_name(aspm_pdev));
+ return false;
+ }
+
+ enabled = pcie_aspm_enabled(aspm_pdev);
+ /* Report the exact link used for the automatic ASPM decision. */
+ dev_dbg(adev->dev, "ASPM: link %s <-> %s is %s\n",
+ pci_name(parent), pci_name(aspm_pdev),
+ enabled ? "enabled" : "disabled");
+
+ return enabled;
}
/* if we get transitioned to only one device, take VGA back */
git bisect start
# status: waiting for both 'good' and 'bad' commits
# good: [833291ee77846538926c990bcb468f6f54e9af50] Linux 6.12.101
git bisect good 833291ee77846538926c990bcb468f6f54e9af50
# status: waiting for 'bad' commit, 1 'good' commit known
# bad: [14c37ff05f22da2fa7076d10f6a07c7ede330c83] Linux 6.12.105
git bisect bad 14c37ff05f22da2fa7076d10f6a07c7ede330c83
# good: [5e489c09c9a220f11ca453354563373727d3a12f] bpf: tcp: Get rid of
st_bucket_done
git bisect good 5e489c09c9a220f11ca453354563373727d3a12f
# good: [a547a9db49d8a4fa6b16e2f5ad9a22629ab97120] powerpc/pseries: pci - logic
bug
git bisect good a547a9db49d8a4fa6b16e2f5ad9a22629ab97120
# bad: [5973ef19ed40bf0d3f63342be49e5346c04a7f34] smb: move get_rfc1002_len()
to common/smbglob.h
git bisect bad 5973ef19ed40bf0d3f63342be49e5346c04a7f34
# bad: [52566c150cadb1a17df840dd25862a61dcf84bed] drm/amdgpu: check ASPM on the
dGPU host link
git bisect bad 52566c150cadb1a17df840dd25862a61dcf84bed
# good: [2fe82e6370731366cea5a85a9952a7492016591e] ceph: fix MDS random
selection readiness predicate
git bisect good 2fe82e6370731366cea5a85a9952a7492016591e
# good: [dc47a98abe6714577a25224534dbd356051097a3] s390/vfio_ccw: Cancel
existing workqueues
git bisect good dc47a98abe6714577a25224534dbd356051097a3
# good: [50f9838b65e9b8c38c8b4fcfdf8f65f364604aeb] s390/vfio_ccw: Calculate
idal length based on idaw type
git bisect good 50f9838b65e9b8c38c8b4fcfdf8f65f364604aeb
# good: [77d14e1c0f0a22bdd83435929dad01f08c00e84c] drm/amd/display: fix BT.2020
YCbCr output CSC matrices for DCE
git bisect good 77d14e1c0f0a22bdd83435929dad01f08c00e84c
# good: [fa9624ad4d6d4b25e448dbc550ddc69e6f849640] drm/amdgpu: fix nbif 6.3.1
l1 low power not functional
git bisect good fa9624ad4d6d4b25e448dbc550ddc69e6f849640
# first 'bad' commit: [52566c150cadb1a17df840dd25862a61dcf84bed] drm/amdgpu:
check ASPM on the dGPU host link
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_KERNEL_ZSTD=y
CONFIG_SYSVIPC=y
CONFIG_POSIX_MQUEUE=y
CONFIG_USELIB=y
CONFIG_NO_HZ_FULL=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_BPF_SYSCALL=y
CONFIG_BPF_JIT=y
CONFIG_BPF_LSM=y
CONFIG_PREEMPT_VOLUNTARY=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
CONFIG_TASKSTATS=y
CONFIG_TASK_DELAY_ACCT=y
CONFIG_TASK_XACCT=y
CONFIG_TASK_IO_ACCOUNTING=y
CONFIG_PSI=y
CONFIG_RCU_LAZY=y
CONFIG_IKCONFIG=m
CONFIG_NUMA_BALANCING=y
CONFIG_MEMCG=y
CONFIG_BLK_CGROUP=y
CONFIG_CFS_BANDWIDTH=y
CONFIG_CGROUP_PIDS=y
CONFIG_CGROUP_RDMA=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_HUGETLB=y
CONFIG_CPUSETS=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_PERF=y
CONFIG_CGROUP_BPF=y
CONFIG_CGROUP_MISC=y
CONFIG_NAMESPACES=y
CONFIG_USER_NS=y
CONFIG_CHECKPOINT_RESTORE=y
CONFIG_SCHED_AUTOGROUP=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EXPERT=y
CONFIG_KALLSYMS_ALL=y
CONFIG_PROFILING=y
CONFIG_KEXEC=y
CONFIG_KEXEC_FILE=y
CONFIG_KEXEC_SIG=y
CONFIG_KEXEC_BZIMAGE_VERIFY_SIG=y
CONFIG_SMP=y
CONFIG_X86_CPU_RESCTRL=y
# CONFIG_X86_EXTENDED_PLATFORM is not set
CONFIG_X86_INTEL_LPSS=y
CONFIG_X86_AMD_PLATFORM_DEVICE=y
CONFIG_HYPERVISOR_GUEST=y
CONFIG_PARAVIRT=y
CONFIG_PARAVIRT_SPINLOCKS=y
CONFIG_XEN=y
CONFIG_XEN_PVH=y
CONFIG_INTEL_TDX_GUEST=y
CONFIG_GART_IOMMU=y
CONFIG_MAXSMP=y
CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
# CONFIG_PERF_EVENTS_INTEL_UNCORE is not set
# CONFIG_PERF_EVENTS_INTEL_RAPL is not set
# CONFIG_PERF_EVENTS_INTEL_CSTATE is not set
CONFIG_X86_MSR=m
CONFIG_AMD_MEM_ENCRYPT=y
CONFIG_NUMA=y
CONFIG_X86_SGX=y
CONFIG_X86_USER_SHADOW_STACK=y
CONFIG_EFI=y
CONFIG_EFI_STUB=y
CONFIG_EFI_MIXED=y
CONFIG_LEGACY_VSYSCALL_NONE=y
CONFIG_LIVEPATCH=y
CONFIG_MITIGATION_SLS=y
CONFIG_HIBERNATION=y
CONFIG_PM_DEBUG=y
CONFIG_PM_ADVANCED_DEBUG=y
CONFIG_ENERGY_MODEL=y
CONFIG_ACPI_EC_DEBUGFS=y
# CONFIG_ACPI_AC is not set
# CONFIG_ACPI_BATTERY is not set
CONFIG_ACPI_BUTTON=m
# CONFIG_ACPI_FAN is not set
CONFIG_ACPI_DOCK=y
CONFIG_ACPI_PCI_SLOT=y
CONFIG_ACPI_HOTPLUG_MEMORY=y
CONFIG_ACPI_BGRT=y
CONFIG_ACPI_HMAT=y
CONFIG_ACPI_APEI=y
CONFIG_ACPI_APEI_GHES=y
CONFIG_ACPI_APEI_PCIEAER=y
CONFIG_ACPI_APEI_MEMORY_FAILURE=y
CONFIG_ACPI_EXTLOG=y
CONFIG_PMIC_OPREGION=y
CONFIG_BYTCRC_PMIC_OPREGION=y
CONFIG_CHTCRC_PMIC_OPREGION=y
CONFIG_CHT_WC_PMIC_OPREGION=y
CONFIG_CPU_FREQ_STAT=y
CONFIG_X86_ACPI_CPUFREQ=m
CONFIG_CPU_IDLE_GOV_MENU=y
CONFIG_INTEL_IDLE=y
CONFIG_IA32_EMULATION=y
CONFIG_X86_X32_ABI=y
CONFIG_KVM=m
CONFIG_KVM_INTEL=m
CONFIG_X86_SGX_KVM=y
CONFIG_KVM_AMD=m
CONFIG_KVM_XEN=y
CONFIG_KPROBES=y
CONFIG_JUMP_LABEL=y
CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT=y
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
CONFIG_MODULE_SIG_SHA256=y
CONFIG_MODULE_COMPRESS=y
CONFIG_MODULE_COMPRESS_XZ=y
CONFIG_MODULE_DECOMPRESS=y
CONFIG_BLK_DEV_BSGLIB=y
CONFIG_BLK_DEV_INTEGRITY=y
CONFIG_BLK_DEV_ZONED=y
CONFIG_BLK_DEV_THROTTLING=y
CONFIG_BLK_WBT=y
CONFIG_BLK_CGROUP_IOCOST=y
CONFIG_BLK_SED_OPAL=y
CONFIG_PARTITION_ADVANCED=y
CONFIG_ACORN_PARTITION=y
CONFIG_ACORN_PARTITION_ICS=y
CONFIG_ACORN_PARTITION_RISCIX=y
CONFIG_OSF_PARTITION=y
CONFIG_AMIGA_PARTITION=y
CONFIG_ATARI_PARTITION=y
CONFIG_MAC_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
CONFIG_LDM_PARTITION=y
CONFIG_SGI_PARTITION=y
CONFIG_ULTRIX_PARTITION=y
CONFIG_SUN_PARTITION=y
CONFIG_KARMA_PARTITION=y
# CONFIG_MQ_IOSCHED_KYBER is not set
CONFIG_BINFMT_MISC=m
CONFIG_ZSWAP=y
CONFIG_ZBUD=y
CONFIG_SLAB_FREELIST_RANDOM=y
CONFIG_SLAB_FREELIST_HARDENED=y
# CONFIG_COMPAT_BRK is not set
CONFIG_MEMORY_HOTPLUG=y
CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE=y
CONFIG_MEMORY_HOTREMOVE=y
CONFIG_PAGE_REPORTING=y
CONFIG_KSM=y
CONFIG_DEFAULT_MMAP_MIN_ADDR=65536
CONFIG_MEMORY_FAILURE=y
CONFIG_TRANSPARENT_HUGEPAGE=y
CONFIG_MEM_SOFT_DIRTY=y
CONFIG_DEFERRED_STRUCT_PAGE_INIT=y
CONFIG_ZONE_DEVICE=y
CONFIG_USERFAULTFD=y
CONFIG_LRU_GEN=y
CONFIG_LRU_GEN_ENABLED=y
CONFIG_NUMA_EMU=y
CONFIG_DAMON=y
CONFIG_DAMON_VADDR=y
CONFIG_DAMON_PADDR=y
CONFIG_DAMON_SYSFS=y
CONFIG_DAMON_RECLAIM=y
CONFIG_DAMON_LRU_SORT=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_XFRM_SUB_POLICY=y
CONFIG_XFRM_MIGRATE=y
CONFIG_XFRM_STATISTICS=y
CONFIG_XDP_SOCKETS=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_FIB_TRIE_STATS=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_MROUTE=y
CONFIG_IP_MROUTE_MULTIPLE_TABLES=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
CONFIG_SYN_COOKIES=y
CONFIG_INET_DIAG=m
CONFIG_INET_DIAG_DESTROY=y
CONFIG_TCP_CONG_ADVANCED=y
# CONFIG_TCP_CONG_BIC is not set
# CONFIG_TCP_CONG_WESTWOOD is not set
# CONFIG_TCP_CONG_HTCP is not set
CONFIG_TCP_MD5SIG=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_ROUTE_INFO=y
CONFIG_IPV6_OPTIMISTIC_DAD=y
CONFIG_IPV6_MIP6=y
# CONFIG_IPV6_SIT is not set
CONFIG_IPV6_SUBTREES=y
CONFIG_IPV6_MROUTE=y
CONFIG_IPV6_MROUTE_MULTIPLE_TABLES=y
CONFIG_IPV6_PIMSM_V2=y
CONFIG_IPV6_SEG6_LWTUNNEL=y
CONFIG_IPV6_SEG6_HMAC=y
CONFIG_NETLABEL=y
CONFIG_MPTCP=y
CONFIG_NETWORK_PHY_TIMESTAMPING=y
CONFIG_NETFILTER=y
CONFIG_NF_CONNTRACK=m
CONFIG_NF_CONNTRACK_MARK=y
CONFIG_NF_CONNTRACK_SECMARK=y
CONFIG_NF_CONNTRACK_ZONES=y
CONFIG_NF_CONNTRACK_PROCFS=y
CONFIG_NF_CONNTRACK_EVENTS=y
CONFIG_NF_CONNTRACK_TIMEOUT=y
CONFIG_NF_CONNTRACK_TIMESTAMP=y
CONFIG_NF_CONNTRACK_LABELS=y
CONFIG_NF_TABLES=m
CONFIG_NF_TABLES_INET=y
CONFIG_NF_TABLES_NETDEV=y
CONFIG_NFT_NAT=m
CONFIG_NFT_COMPAT=m
CONFIG_NETFILTER_XT_MARK=m
CONFIG_NETFILTER_XT_NAT=m
CONFIG_NETFILTER_XT_MATCH_ADDRTYPE=m
CONFIG_NETFILTER_XT_MATCH_CGROUP=m
CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m
CONFIG_NETFILTER_XT_MATCH_OWNER=m
CONFIG_NF_TABLES_ARP=y
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP6_NF_IPTABLES=m
CONFIG_IP6_NF_FILTER=m
CONFIG_IP6_NF_TARGET_REJECT=m
CONFIG_NET_SCHED=y
CONFIG_NET_SCH_FQ_CODEL=y
CONFIG_NET_SCH_DEFAULT=y
CONFIG_DEFAULT_FQ_CODEL=y
CONFIG_NET_EMATCH=y
CONFIG_NET_CLS_ACT=y
CONFIG_DCB=y
CONFIG_MPLS=y
CONFIG_NET_MPLS_GSO=y
CONFIG_NET_SWITCHDEV=y
CONFIG_NET_L3_MASTER_DEV=y
CONFIG_QRTR=m
CONFIG_CGROUP_NET_PRIO=y
CONFIG_BPF_STREAM_PARSER=y
CONFIG_HAMRADIO=y
CONFIG_RFKILL=m
CONFIG_RFKILL_INPUT=y
CONFIG_PCI=y
CONFIG_PCIEPORTBUS=y
CONFIG_HOTPLUG_PCI_PCIE=y
CONFIG_PCIEAER=y
CONFIG_PCIE_DPC=y
CONFIG_PCIE_PTM=y
CONFIG_PCI_REALLOC_ENABLE_AUTO=y
# CONFIG_XEN_PCIDEV_FRONTEND is not set
CONFIG_PCI_IOV=y
CONFIG_HOTPLUG_PCI=y
CONFIG_HOTPLUG_PCI_ACPI=y
CONFIG_HOTPLUG_PCI_CPCI=y
CONFIG_HOTPLUG_PCI_SHPC=y
CONFIG_CXL_BUS=y
# CONFIG_CXL_PCI is not set
# CONFIG_CXL_ACPI is not set
CONFIG_DEVTMPFS=y
CONFIG_FW_LOADER_USER_HELPER=y
CONFIG_FW_LOADER_COMPRESS=y
CONFIG_FW_LOADER_COMPRESS_ZSTD=y
CONFIG_CONNECTOR=y
CONFIG_DMI_SYSFS=y
CONFIG_GOOGLE_FIRMWARE=y
CONFIG_GOOGLE_COREBOOT_TABLE=y
CONFIG_GOOGLE_FRAMEBUFFER_COREBOOT=y
CONFIG_EFI_VARS_PSTORE=m
CONFIG_APPLE_PROPERTIES=y
CONFIG_RESET_ATTACK_MITIGATION=y
CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m
CONFIG_PARPORT_1284=y
# CONFIG_PNP_DEBUG_MESSAGES is not set
# CONFIG_XEN_BLKDEV_FRONTEND is not set
CONFIG_NVME_MULTIPATH=y
CONFIG_NVME_HWMON=y
CONFIG_NVME_RDMA=m
CONFIG_NVME_HOST_AUTH=y
# CONFIG_INTEL_MEI is not set
CONFIG_PVPANIC=y
# CONFIG_SCSI_PROC_FS is not set
CONFIG_BLK_DEV_SD=m
CONFIG_BLK_DEV_SR=m
CONFIG_CHR_DEV_SG=m
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_MEGARAID_NEWGEN=y
CONFIG_SCSI_DH=y
CONFIG_ATA=m
CONFIG_SATA_ZPODD=y
CONFIG_SATA_AHCI=m
CONFIG_SATA_ACARD_AHCI=m
CONFIG_PATA_JMICRON=m
CONFIG_ATA_GENERIC=m
CONFIG_MD=y
CONFIG_FUSION=y
CONFIG_MACINTOSH_DRIVERS=y
CONFIG_MAC_EMUMOUSEBTN=y
CONFIG_NETDEVICES=y
CONFIG_NET_FC=y
CONFIG_TUN=m
CONFIG_NETKIT=y
# CONFIG_NET_VENDOR_ARC is not set
CONFIG_NET_TULIP=y
CONFIG_SKY2=m
# CONFIG_NET_VENDOR_SEEQ is not set
CONFIG_FDDI=y
CONFIG_HIPPI=y
# CONFIG_USB_NET_DRIVERS is not set
CONFIG_ATH5K_PCI=y
# CONFIG_WLAN_VENDOR_TI is not set
CONFIG_WAN=y
# CONFIG_XEN_NETDEV_FRONTEND is not set
CONFIG_ISDN=y
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_EVDEV=m
# CONFIG_MOUSE_PS2 is not set
CONFIG_INPUT_JOYSTICK=y
CONFIG_INPUT_TABLET=y
CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_INPUT_MISC=y
CONFIG_INPUT_PCSPKR=m
# CONFIG_SERIO_SERPORT is not set
CONFIG_SERIO_RAW=m
# CONFIG_LEGACY_PTYS is not set
# CONFIG_LEGACY_TIOCSTI is not set
CONFIG_SERIAL_8250=y
# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
CONFIG_SERIAL_8250_FINTEK=y
CONFIG_SERIAL_8250_CONSOLE=y
# CONFIG_SERIAL_8250_EXAR is not set
CONFIG_SERIAL_8250_NR_UARTS=32
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
CONFIG_SERIAL_8250_RSA=y
CONFIG_SERIAL_8250_DW=y
# CONFIG_SERIAL_8250_LPSS is not set
CONFIG_SERIAL_NONSTANDARD=y
CONFIG_SERIAL_DEV_BUS=y
CONFIG_PRINTER=m
CONFIG_PPDEV=m
CONFIG_VIRTIO_CONSOLE=y
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_INTEL is not set
# CONFIG_HW_RANDOM_AMD is not set
# CONFIG_HW_RANDOM_VIA is not set
CONFIG_HPET=y
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=m
CONFIG_I2C_I801=m
CONFIG_I2C_DESIGNWARE_CORE=y
CONFIG_I2C_DESIGNWARE_BAYTRAIL=y
CONFIG_SPI=y
CONFIG_SPI_MEM=y
CONFIG_SPI_SPIDEV=y
# CONFIG_PTP_1588_CLOCK_KVM is not set
CONFIG_PINCTRL_AMD=y
CONFIG_PINCTRL_BAYTRAIL=y
CONFIG_PINCTRL_CHERRYVIEW=y
CONFIG_PINCTRL_BROXTON=y
CONFIG_PINCTRL_CANNONLAKE=y
CONFIG_PINCTRL_CEDARFORK=y
CONFIG_PINCTRL_DENVERTON=y
CONFIG_PINCTRL_GEMINILAKE=y
CONFIG_PINCTRL_ICELAKE=y
CONFIG_PINCTRL_LEWISBURG=y
CONFIG_PINCTRL_SUNRISEPOINT=y
CONFIG_PINCTRL_TIGERLAKE=y
CONFIG_GPIO_SYSFS=y
CONFIG_SENSORS_CORETEMP=m
CONFIG_THERMAL_STATISTICS=y
CONFIG_THERMAL_GOV_FAIR_SHARE=y
CONFIG_THERMAL_GOV_BANG_BANG=y
CONFIG_THERMAL_GOV_USER_SPACE=y
CONFIG_THERMAL_GOV_POWER_ALLOCATOR=y
CONFIG_DEVFREQ_THERMAL=y
# CONFIG_X86_PKG_TEMP_THERMAL is not set
CONFIG_INTEL_HFI_THERMAL=y
CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_SYSFS=y
CONFIG_WATCHDOG_HRTIMER_PRETIMEOUT=y
CONFIG_WATCHDOG_PRETIMEOUT_GOV=y
# CONFIG_WATCHDOG_PRETIMEOUT_GOV_NOOP is not set
CONFIG_ITCO_WDT=m
CONFIG_ITCO_VENDOR_SUPPORT=y
CONFIG_LPC_ICH=m
CONFIG_INTEL_SOC_PMIC=y
CONFIG_INTEL_SOC_PMIC_CHTWC=y
CONFIG_MFD_INTEL_PMC_BXT=m
CONFIG_MFD_SYSCON=y
CONFIG_REGULATOR=y
CONFIG_RC_CORE=m
CONFIG_LIRC=y
# CONFIG_RC_MAP is not set
CONFIG_RC_DECODERS=y
CONFIG_RC_DEVICES=y
CONFIG_MEDIA_CEC_RC=y
CONFIG_MEDIA_CEC_SUPPORT=y
CONFIG_AGP=y
CONFIG_AGP_AMD64=y
CONFIG_AGP_INTEL=y
CONFIG_AGP_SIS=y
CONFIG_AGP_VIA=y
CONFIG_VGA_SWITCHEROO=y
CONFIG_DRM=m
CONFIG_DRM_LOAD_EDID_FIRMWARE=y
CONFIG_DRM_DISPLAY_DP_AUX_CEC=y
CONFIG_DRM_DISPLAY_DP_AUX_CHARDEV=y
CONFIG_DRM_AMDGPU=m
CONFIG_DRM_AMDGPU_SI=y
CONFIG_DRM_AMDGPU_CIK=y
CONFIG_DRM_AMD_ACP=y
CONFIG_DRM_AMD_DC_SI=y
CONFIG_HSA_AMD=y
CONFIG_FB=y
CONFIG_FB_VESA=y
CONFIG_FB_EFI=y
CONFIG_FB_SIMPLE=y
CONFIG_FIRMWARE_EDID=y
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y
CONFIG_BACKLIGHT_CLASS_DEVICE=y
CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y
CONFIG_DRM_ACCEL=y
CONFIG_SOUND=m
# CONFIG_SOUND_OSS_CORE_PRECLAIM is not set
CONFIG_SND=m
CONFIG_SND_OSSEMUL=y
CONFIG_SND_HRTIMER=m
CONFIG_SND_SEQUENCER=m
CONFIG_SND_SEQ_DUMMY=m
CONFIG_SND_HDA_INTEL=m
CONFIG_SND_HDA_HWDEP=y
CONFIG_SND_HDA_INPUT_BEEP=y
CONFIG_SND_HDA_PATCH_LOADER=y
CONFIG_SND_HDA_CODEC_REALTEK=m
CONFIG_SND_HDA_CODEC_HDMI=m
CONFIG_SND_HDA_POWER_SAVE_DEFAULT=10
CONFIG_SND_HDA_PREALLOC_SIZE=2048
CONFIG_HID=m
CONFIG_HID_BATTERY_STRENGTH=y
CONFIG_HIDRAW=y
CONFIG_HID_PID=y
CONFIG_USB_HIDDEV=y
# CONFIG_I2C_HID is not set
CONFIG_USB_LED_TRIG=y
CONFIG_USB=m
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
CONFIG_USB_DYNAMIC_MINORS=y
CONFIG_USB_XHCI_HCD=m
CONFIG_USB_EHCI_HCD=m
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_UHCI_HCD=m
CONFIG_USB_STORAGE=m
CONFIG_USB_UAS=m
CONFIG_LEDS_CLASS=y
CONFIG_LEDS_BRIGHTNESS_HW_CHANGED=y
CONFIG_LEDS_TRIGGER_DISK=y
CONFIG_LEDS_TRIGGER_CPU=y
CONFIG_LEDS_TRIGGER_PANIC=y
CONFIG_ACCESSIBILITY=y
CONFIG_A11Y_BRAILLE_CONSOLE=y
CONFIG_INFINIBAND=m
CONFIG_EDAC=y
# CONFIG_EDAC_DECODE_MCE is not set
CONFIG_RTC_CLASS=y
CONFIG_DMADEVICES=y
CONFIG_ASYNC_TX_DMA=y
CONFIG_UDMABUF=y
CONFIG_DMABUF_HEAPS=y
CONFIG_DMABUF_HEAPS_SYSTEM=y
CONFIG_VIRT_DRIVERS=y
# CONFIG_SEV_GUEST is not set
CONFIG_VIRTIO_PCI=y
# CONFIG_XEN_DEV_EVTCHN is not set
# CONFIG_XENFS is not set
# CONFIG_XEN_GNTDEV is not set
# CONFIG_XEN_GRANT_DEV_ALLOC is not set
# CONFIG_XEN_PCIDEV_BACKEND is not set
# CONFIG_XEN_PRIVCMD is not set
# CONFIG_XEN_ACPI_PROCESSOR is not set
CONFIG_XEN_MCE_LOG=y
CONFIG_STAGING=y
CONFIG_STAGING_MEDIA=y
CONFIG_CHROME_PLATFORMS=y
# CONFIG_WMI_BMOF is not set
CONFIG_X86_PLATFORM_DRIVERS_DELL=y
# CONFIG_ALIENWARE_WMI is not set
# CONFIG_DCDBAS is not set
# CONFIG_DELL_RBU is not set
# CONFIG_DELL_RBTN is not set
# CONFIG_DELL_SMBIOS is not set
# CONFIG_DELL_SMO8800 is not set
# CONFIG_DELL_WMI_AIO is not set
# CONFIG_DELL_WMI_DDV is not set
# CONFIG_DELL_WMI_LED is not set
# CONFIG_DELL_WMI_SYSMAN is not set
CONFIG_X86_PLATFORM_DRIVERS_HP=y
# CONFIG_HP_ACCEL is not set
# CONFIG_HP_WMI is not set
# CONFIG_HP_BIOSCFG is not set
CONFIG_INTEL_TURBO_MAX_3=y
CONFIG_AMD_IOMMU=y
CONFIG_INTEL_IOMMU=y
CONFIG_INTEL_IOMMU_SVM=y
# CONFIG_INTEL_IOMMU_DEFAULT_ON is not set
CONFIG_IRQ_REMAP=y
CONFIG_PM_DEVFREQ=y
CONFIG_MEMORY=y
CONFIG_PWM=y
CONFIG_PWM_CRC=y
CONFIG_RESET_CONTROLLER=y
CONFIG_GENERIC_PHY=y
CONFIG_POWERCAP=y
CONFIG_IDLE_INJECT=y
CONFIG_RAS_CEC=y
CONFIG_EXT4_FS=m
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_EXT4_FS_SECURITY=y
CONFIG_BTRFS_FS=m
CONFIG_BTRFS_FS_POSIX_ACL=y
CONFIG_FS_DAX=y
CONFIG_EXPORTFS_BLOCK_OPS=y
CONFIG_FS_ENCRYPTION=y
CONFIG_FS_VERITY=y
CONFIG_FS_VERITY_BUILTIN_SIGNATURES=y
CONFIG_FANOTIFY=y
CONFIG_FANOTIFY_ACCESS_PERMISSIONS=y
CONFIG_QUOTA=y
CONFIG_QUOTA_NETLINK_INTERFACE=y
CONFIG_AUTOFS_FS=m
CONFIG_FUSE_FS=y
CONFIG_VIRTIO_FS=y
CONFIG_PROC_KCORE=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_TMPFS_INODE64=y
CONFIG_HUGETLBFS=y
CONFIG_CONFIGFS_FS=m
# CONFIG_EFIVAR_FS is not set
CONFIG_NLS_DEFAULT="utf8"
CONFIG_UNICODE=y
CONFIG_PERSISTENT_KEYRINGS=y
CONFIG_KEY_DH_OPERATIONS=y
CONFIG_SECURITY_DMESG_RESTRICT=y
CONFIG_SECURITY=y
CONFIG_SECURITY_NETWORK_XFRM=y
CONFIG_INTEL_TXT=y
CONFIG_HARDENED_USERCOPY=y
CONFIG_FORTIFY_SOURCE=y
CONFIG_SECURITY_SELINUX=y
CONFIG_SECURITY_TOMOYO=y
CONFIG_SECURITY_APPARMOR=y
CONFIG_SECURITY_YAMA=y
CONFIG_SECURITY_LOCKDOWN_LSM=y
CONFIG_SECURITY_LOCKDOWN_LSM_EARLY=y
CONFIG_SECURITY_LANDLOCK=y
CONFIG_SECURITY_IPE=y
CONFIG_INTEGRITY_SIGNATURE=y
CONFIG_INTEGRITY_ASYMMETRIC_KEYS=y
# CONFIG_INTEGRITY_TRUSTED_KEYRING is not set
CONFIG_INTEGRITY_PLATFORM_KEYRING=y
CONFIG_INTEGRITY_MACHINE_KEYRING=y
CONFIG_IMA=y
CONFIG_IMA_SIG_TEMPLATE=y
CONFIG_IMA_DEFAULT_HASH_SHA256=y
CONFIG_IMA_APPRAISE=y
CONFIG_IMA_ARCH_POLICY=y
CONFIG_EVM=y
CONFIG_DEFAULT_SECURITY_APPARMOR=y
CONFIG_LSM="landlock,lockdown,yama,loadpin,safesetid,integrity,apparmor,selinux,smack,tomoyo,bpf,ipe"
CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y
CONFIG_BUG_ON_DATA_CORRUPTION=y
CONFIG_CRYPTO_FIPS=y
# CONFIG_CRYPTO_MANAGER_DISABLE_TESTS is not set
CONFIG_CRYPTO_ECDSA=y
# CONFIG_CRYPTO_CTS is not set
# CONFIG_CRYPTO_XTS is not set
CONFIG_CRYPTO_DRBG_HASH=y
CONFIG_CRYPTO_DRBG_CTR=y
CONFIG_CRYPTO_BLAKE2S_X86=y
CONFIG_CRYPTO_SHA1_SSSE3=m
CONFIG_CRYPTO_SHA256_SSSE3=m
CONFIG_CRYPTO_SHA512_SSSE3=m
CONFIG_CRYPTO_DEV_CCP=y
# CONFIG_CRYPTO_DEV_CCP_DD is not set
CONFIG_SIGNED_PE_FILE_VERIFICATION=y
CONFIG_SECONDARY_TRUSTED_KEYRING=y
CONFIG_SYSTEM_BLACKLIST_KEYRING=y
# CONFIG_XZ_DEC_POWERPC is not set
# CONFIG_XZ_DEC_ARM is not set
# CONFIG_XZ_DEC_ARMTHUMB is not set
# CONFIG_XZ_DEC_SPARC is not set
CONFIG_XZ_DEC_MICROLZMA=y
CONFIG_FONTS=y
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
CONFIG_FONT_TER16x32=y
CONFIG_PRINTK_TIME=y
CONFIG_BOOT_PRINTK_DELAY=y
CONFIG_DYNAMIC_DEBUG=y
CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
CONFIG_DEBUG_INFO_BTF=y
CONFIG_MODULE_ALLOW_BTF_MISMATCH=y
CONFIG_STRIP_ASM_SYMS=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x01b6
CONFIG_PAGE_EXTENSION=y
CONFIG_PAGE_POISONING=y
CONFIG_DEBUG_WX=y
CONFIG_SCHED_STACK_END_CHECK=y
CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_KFENCE=y
CONFIG_KFENCE_SAMPLE_INTERVAL=0
CONFIG_HARDLOCKUP_DETECTOR=y
CONFIG_SCHEDSTATS=y
CONFIG_DEBUG_LIST=y
# CONFIG_RCU_TRACE is not set
CONFIG_FPROBE=y
CONFIG_STACK_TRACER=y
CONFIG_MMIOTRACE=y
CONFIG_FTRACE_SYSCALLS=y
CONFIG_TRACER_SNAPSHOT=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_HIST_TRIGGERS=y
CONFIG_IO_STRICT_DEVMEM=y
# CONFIG_X86_VERBOSE_BOOTUP is not set
CONFIG_MEMTEST=y
-[0000:00]-+-00.0 Intel Corporation 82P965/G965 Memory Controller Hub
[8086:29a0]
+-01.0-[01]--+-00.0 Advanced Micro Devices, Inc. [AMD/ATI]
Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] [1002:67df]
| \-00.1 Advanced Micro Devices, Inc. [AMD/ATI]
Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590] [1002:aaf0]
+-1a.0 Intel Corporation 82801H (ICH8 Family) USB UHCI Controller
#4 [8086:2834]
+-1a.1 Intel Corporation 82801H (ICH8 Family) USB UHCI Controller
#5 [8086:2835]
+-1a.7 Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller
#2 [8086:283a]
+-1b.0 Intel Corporation 82801H (ICH8 Family) HD Audio Controller
[8086:284b]
+-1c.0-[02]--
+-1c.2-[03]----00.0 NEC Corporation uPD720200 USB 3.0 Host
Controller [1033:0194]
+-1c.3-[04]--+-00.0 JMicron Technology Corp. JMB363 SATA/IDE
Controller [197b:2363]
| \-00.1 JMicron Technology Corp. JMB363 SATA/IDE
Controller [197b:2363]
+-1c.4-[05]----00.0 Marvell Technology Group Ltd. 88E8056 PCI-E
Gigabit Ethernet Controller [11ab:4364]
+-1d.0 Intel Corporation 82801H (ICH8 Family) USB UHCI Controller
#1 [8086:2830]
+-1d.1 Intel Corporation 82801H (ICH8 Family) USB UHCI Controller
#2 [8086:2831]
+-1d.2 Intel Corporation 82801H (ICH8 Family) USB UHCI Controller
#3 [8086:2832]
+-1d.7 Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller
#1 [8086:2836]
+-1e.0-[06]--
+-1f.0 Intel Corporation 82801HB/HR (ICH8/R) LPC Interface
Controller [8086:2810]
+-1f.2 Intel Corporation 82801HB (ICH8) 4 port SATA Controller
[AHCI mode] [8086:2824]
\-1f.3 Intel Corporation 82801H (ICH8 Family) SMBus Controller
[8086:283e]
Debian BTS #1146343 - compact bisection and operational result summary
Prepared 2026-09-05 CDT - NOT SENT
Scope and provenance
- DUT / sole behavioral authority: work-box, AMD Radeon RX480 / Polaris10
[1002:67df].
- Builder only: WS2 amd64. WS2 and its NVIDIA GPU supplied no behavioral
classification.
- Frozen config: my_defconfig derived on work-box while booted into accepted
Debian 6.12.101; SHA-256
7a6a406cb03e0e494fea4e685b1ae8e96bed6142472fbbddc5b8a95fbe96b7dd.
- Workload: real RustDesk H.264 VAAPI sessions on the RX480, with periodic
signature sampling and complete candidate-boot journals.
Endpoint and bisect results
- v6.12.101: GOOD.
- v6.12.105: BAD; ring vce0 timeout, GPU reset, and VRAM loss reproduced.
- Mechanical first bad: 52566c150cadb1a17df840dd25862a61dcf84bed, "drm/amdgpu:
check ASPM on the dGPU host link".
- Immediate parent fa9624ad4d6d4b25e448dbc550ddc69e6f849640: GOOD during
bisection and later strongly qualified GOOD.
- Full v6.12.105 with only 52566c150cad... reverted: BAD after about 79 seconds.
Interpretation boundary
The mechanical first-bad boundary is established. Single-commit causal
sufficiency is not established because reverting only that commit from the full
v6.12.105 tree did not rescue the regression. The isolated revert may be
insufficient or the failure may involve an interaction with other later-tree
changes.
Hardware/topology review point
Captured PCI topology places the RX480 directly behind Intel root port
0000:00:01.0. No AMD internal PCIe switch was observed in the path. This makes
the precise effect of the first-bad patch on this hardware worthy of upstream
review.
Operational qualifications
- fa9624ad4d6d4b25e448dbc550ddc69e6f849640: two sessions totalling about
43m24s, deliberate reconnect, 288/288 clean samples, clean complete journal;
then two normal promoted boots and a further 10-minute H.264 VAAPI canary with
60/60 clean samples. Current deterministic primary/default.
- Exact v6.12.103: about 25m51s across three sessions with two reconnects,
174/174 clean samples and clean complete journal. Qualified emergency fallback.
- Debian 6.12.101+deb13-amd64: retained as secondary rescue.
Not performed
- Optional one-shot amdgpu.aspm=0 mechanism probe: NOT RUN.
- No newer-kernel qualification, bisect reset, retained-kernel cleanup, or
external submission.
Initial attachment set
1. git-bisect-log.txt - complete unmodified bisect log.
2. my_defconfig - frozen work-box-derived build configuration.
3. first-bad-full-show.txt - first-bad commit metadata and full diff.
4. pci-topology-tree.txt - compact PCI topology.
5. endpoint-v6.12.105-bad-signature.txt - characteristic endpoint failure
extract.
6. v6.12.105-revert525-bad-signature.txt - characteristic single-revert failure
extract.
Full candidate journals, detailed PCI data, build logs, package hashes,
manifests, and sealed review archives remain available on request.
2026-09-05T13:56:20-05:00 work-box kernel: amdgpu 0000:01:00.0: amdgpu: ring
vce0 timeout, signaled seq=447, emitted seq=448
2026-09-05T13:56:20-05:00 work-box kernel: amdgpu 0000:01:00.0: amdgpu: GPU
reset begin!
2026-09-05T13:56:24-05:00 work-box kernel: amdgpu 0000:01:00.0: amdgpu: GPU
reset succeeded, trying to resume
2026-09-05T13:56:24-05:00 work-box kernel: [drm] VRAM is lost due to GPU reset!
2026-09-05T13:56:24-05:00 work-box kernel: amdgpu 0000:01:00.0: amdgpu: GPU
reset(1) succeeded!
