On 11/05/2017 11:50 AM, Larry Finger wrote:
If you read the commit message for commit b8b8b16352cd, you will find
that we do not understand why using a byte read causes failure, but
reverting the change so that it is a word read made it function again.
The "fix" was found by a user doing bisection, and verified on my
system, where the RTL8821AE has stable connections. The transfer rates
take wild swings, but the connection is not dropped.
If you NIC behaves differently, then you will need to help us debug the
problem. If you had a kernel that worked, then you might try bisection.
I just tested on kernels 4.12 and 4.13 - my connection gets dropped on
those kernels as well. Right now I'm using 4.14-rc7.
If that is not possible, you might try various combinations of module
parameters aspm, int_clear, and msi
Thanks for these suggestions. Disabling ASPM solves my connection
dropping issue! Previously, I was getting disconnected around 10 seconds
after starting "git clone" on a large git repository. Now, I haven't
seen the connection drop once.
I can help debug the issue. I'm using a Lenovo Ideapad 320-15ABR laptop.
Here's the lspci -vv info for my NIC:
01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821AE
802.11ac PCIe Wireless Network Adapter
Subsystem: Lenovo RTL8821AE 802.11ac PCIe Wireless Network Adapter
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 33
Region 0: I/O ports at 2000 [size=256]
Region 2: Memory at f0b00000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: rtl8821ae
