Re: [REGRESSION] 6.12.36+: usb: hub: post-resume delayed work triggers > uncorrected MCE / data fabric sync flood on Threadripper 7970X > (bisected to aec11e5f9c45)

[Mario Limonciello]

On 8/25/26 03:57, Mathieu Fluhr wrote:
> > The behavior that is described here sounds like a platform firmware bug
> > Are you on the latest BIOS available from your OEM?
>
> Ywa, And I even rolled back 2 BIOS before, All 3 are showing the issue...
> ...even the exact same one (with the exact same CMOS settings) that I
> used in 2024 without any single issue.
>
> > Can you please confirm:
> > Your CPU model number/codename
> AMD Ryzen Threadripper 7870X 32.Cores
>
> mathieu@ubuntu:~$ cat /proc/cpuinfo
> processor : 0
> vendor_id : AuthenticAMD
> cpu family : 25
> model : 24
> model name : AMD Ryzen Threadripper 7970X 32-Cores
> stepping : 1
> microcode : 0xa10810c
> cpu MHz : 2188.582
> cache size : 1024 KB
> physical id : 0
> siblings : 64
> core id : 0
> cpu cores : 32
> apicid : 0
> initial apicid : 0
> fpu : yes
> fpu_exception : yes
> cpuid level : 16
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
> pdpe1gb rdtscp lm constant_tsc rep_good amd_lbr_v2 nopl xtopology
> nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor
> ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx
> f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a
> misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core
> perfctr_nb bpext perfctr_llc mwaitx cpuid_fault cpb cat_l3 cdp_l3
> hw_pstate ssbd mba perfmon_v2 ibrs ibpb stibp ibrs_enhanced vmmcall
> fsgsbase bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq
> rdseed adx smap avx512ifma clflushopt clwb avx512cd sha_ni avx512bw
> avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc
> cqm_mbm_total cqm_mbm_local user_shstk avx512_bf16 clzero irperf
> xsaveerptr rdpru wbnoinvd amd_ppin cppc arat npt lbrv svm_lock
> nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter
> pfthreshold avic vgif x2avic v_spec_ctrl vnmi avx512vbmi umip pku
> ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg
> avx512_vpopcntdq la57 rdpid overflow_recov succor smca fsrm flush_l1d
> debug_swap
> bugs : sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass srso
> spectre_v2_user tsa vmscape
> bogomips : 7988.27
> TLB size : 3584 4K pages
> clflush size : 64
> cache_alignment : 64
> address sizes : 52 bits physical, 57 bits virtual
> power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
> [..]
>
> 2. Your OEM (from /sys/class/dmi/id)
> I am using an ASUS Pro WS TRX50-SAGE WIFI
>
> root@ubuntu:/home/mathieu# cat /sys/class/dmi/id/board*
> Default string
> Pro WS TRX50-SAGE WIFI
> 231230340100705
> ASUSTeK COMPUTER INC.
> Rev 1.xx
>
> 3. OEM BIOS version (from /sys/class/dmi/id)
> root@ubuntu:/home/mathieu# cat /sys/class/dmi/id/bios*
> 02/03/2026
> 13.17
> American Megatrends Inc.
> 1317
>
> 4. AGESA version (see commit bc91133e260c8113c1119073c03b93c12aa41738 if
> the OEM didn't tear it out.  Otherwise look in BIOS menus)?
>
> The BOIS shoes this information (I also put the ones from previous
> BIOS I tested):
> BIOS 1317: ComboSP6PI 1.0.0.1e
> BIOS 1203: ComboSP6PI 1.0.0.1a Patch A
> BIOS 0803: StormPeakPI_1.1.0.0g
This isn't a BIOS regression, it's been around since the beginning on 
this threadripper model but it was harder to trigger.
The Linux kernel changes in the bisect exposed a platform issue.

The workaround you can do for now is to disable runtime PM on the XHCI 
controller to avoid triggering it.  But it's a platform issue.

For a proper fix you need to reach out to ASUS to get an AGESA upgrade.
You can ask them to reach out to AMD if they need assistance/guidance on 
the versions that contain the fix for this.  You can share this thread 
with them for reference.