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X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB7253 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.