Pre-installed in some regions with a custom Ubuntu image that takes advantage of the system’s hardware features and may include additional software. Standard images of Ubuntu may not work well, or at all.
This system was tested with 18.04 LTS, running the 4.15.0-1035-oem kernel.
Upgrading bluez to 5.50 as mentioned in link below can fix the problem:
Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller pci (10ec:8168)
Intel Corp. Intel(R) Pentium(R) Gold G5420 CPU @ 3.80GHz
Intel Corp. UHD Graphics 610 pci (8086:3e90)
Qualcomm Atheros Killer N1525 Wireless-AC pci (168c:003e)
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