Dell Precision 7730, sig=0x906ea/20200609, System hangs when resuming from S3 if in battery mode

[AceLan Kao]

Sku: Dell Precision 7730
BIOS: 1.12.1 (11/11/2019)
Kernel: 4.15.0-1081-oem & mainline 5.7.0

1. Boot up the system(with AC or Bat only)
2. enter S3, unplug AC if plugged, can't wake up the system
3. enter S3, plug AC, the system can be waken up by power button

Can't reproduce this issue with the intel-microcode=3.20180312.0~ubuntu18.04.1 in bionic repo.
After upgrade this package to intel-microcode=3.20200609.0ubuntu0.18.04.1 or the previous version leads to the resume hang issue.

[PhilJ (zfil)]

I've the same problem on a Dell Precision 7530

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[PhilJ (zfil)]

More info:

Dell Precision 7530
BIOS 1.13.1 (but same behavior with 1.12.1)
Kernel: 5.3.0-59-generic

/usr/sbin/iucode_tool: system has processor(s) with signature 0x000906ea

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 158
model name : Intel(R) Core(TM) i7-8850H CPU @ 2.60GHz
stepping : 10
microcode : 0xd6
cpu MHz : 4056.731
cache size : 9216 KB
physical id : 0
siblings : 12
core id : 0
cpu cores : 6
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 22
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit srbds
bogomips : 5199.98
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:

[AceLan Kao (acelankao)]

Upstream bug
https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/issues/34