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

[Mathieu Fluhr]

> 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.

So, long story short, the kernel source code is correct, and the issue comes
from the BIOS/AGESA, correct?

> 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.

I will. But this leaves me with a few questions here:
1. Do you already have a fixed AGESA on AMD side, that ASUS could use?
2. Does this issue also affect other threadripper generations, like the 9970x?
3. I guess not only ASUS is concerned but Also ASRock and Gigabyte which
also produces TRX50 mainboards, correct?

On Wed, Aug 26, 2026 at 5:14 AM Mario Limonciello
<mario.limonciello@xxxxxxx> wrote:
>
>
>
> 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.