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Old 04-24-2017, 03:47 PM   #1
danmartinj
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Registered: Oct 2009
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Trouble Shooting Network on Arm Device


Hello,

I have a Solid-Run Clearfog Pro device that is running a Marvell Armada 38X SOC using ARMv7. The operating system is Debian with a 4.4.28 kernel. From day one I have had problems getting two of my atheros PCIe WiFi cards to work together on the device.

Finally, I now can get both WiFi cards up at the same time, however it is intermittent as sometimes it works and sometimes it does not. On average after a clean restart both cards come up about 25% of the time.

If I run lspci when only one card is up I get as output:
Code:
00:02.0 PCI bridge: Marvell Technology Group Ltd. Device 6828 (rev 04)
00:03.0 PCI bridge: Marvell Technology Group Ltd. Device 6828 (rev 04)
02:00.0 Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter (rev 01)
The file /etc/udev/rules.d/70-persistent-net.rules
Code:
# Unknown net device (/devices/platform/soc/soc:internal-regs/f1030000.ethernet/net/eth1) (mvneta)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="MAC", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

# Unknown net device (/devices/platform/soc/soc:internal-regs/f1070000.ethernet/net/eth0) (mvneta)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="MAC", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# Unknown net device (/devices/platform/soc/soc:internal-regs/f1034000.ethernet/net/eth2) (mvneta)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="MAC", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"

# PCI device 0x168c:0x0034 (ath9k)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="MAC", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
Currently the only drivers I installed was firmware-linux-free - Binary firmware for various drivers in the Linux kernel.

I cannot but help think the systemd service is behind this or it could be a uboot problem but I really do not know where to further look for clues. Maybe someone has some ideas?
 
Old 04-25-2017, 03:28 PM   #2
jefro
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From the OEM site, "ClearFog has two official distributions, Yocto and OpenWrt." Might try those just to see if stable. If so then we might confirm that the board is OK.

Since they don't support debian and test it at the factory I'd say you may be out of luck.

Guess you could try other distro's and maybe try the latest 4.10 or 4.11 and build in driver if needed.

I have an unrelated device that would do that on wifi till I upgraded to 4.10 and it finally stopped on ubuntu. I played with all sorts of things from web pages and nothing really ever fixed it till the latest kernels.

It may be that their support staff would know a solution.

Last edited by jefro; 04-25-2017 at 03:29 PM.
 
Old 04-26-2017, 09:10 AM   #3
danmartinj
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Registered: Oct 2009
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Hi Jefro,

Yeah, I am leaning toward trying that as well. That I would say is good advice. I will try it today and report back my findings. Thanks for your assistance.

Joe
 
  


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