On one of my machines, I have some interesting interference. Bluetooth
works just fine, and so does networking. Bluetooth is normally disabled.
However, when I have Bluetooth turned on (and after I turn it off), SSH
is *slow*.
I gather that the network controller is also the Bluetooth controller:
root@tiassa:~# lspci -vs 2:0.0
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac
PCIe Wireless Network Adapter
Subsystem: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe
Wireless Network Adapter
Flags: bus master, fast devsel, latency 0, IRQ 132, IOMMU group 10
I/O ports at 4000 [size=256]
Memory at 80500000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [148] Device Serial Number 00-e0-4c-ff-fe-c8-21-01
Capabilities: [158] Latency Tolerance Reporting
Capabilities: [160] L1 PM Substates
Capabilities: [170] Precision Time Measurement
Capabilities: [17c] Vendor Specific Information: ID=0003 Rev=1 Len=054
<?>
Kernel driver in use: rtw_8821ce
Kernel modules: rtw88_8821ce
root@tiassa:~# uname -a
Linux tiassa 6.6.13+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.6.13-1~bpo12+1
(2024-02-15) x86_64 GNU/Linux
root@tiassa:~#
https://www.realtek.com/Product/Index?id=587
Is there some sort of cross-talk issue?
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