So, as you know, MANY tab s2 users are having issues getting Wifi to turn on. In @hga89's case, WiFi was working, and then overnight, it stopped working. Restoring the stock firmware didn't help at all. He managed to get some logs:
@ashyx seemed to think that a hardware failure was possible, but he wasn't quite sure.
By the way, this is from a T810.
THIS ALSO EXPLAINS WHY some people had working WiFi on the CM12.1/CM13 threads and some didn't. (Also the camera...?)
Possible Causes:
Hardware Failure:
Seems likely. This is all off of memory, but according to @ashyx, the wifi driver uses "pcie_register_driver" to do 2 things:
- Initialize the PCIe device (in this case, the WiFi card)
- Initialize the driver (in this case, the WiFi driver)
According to him, the issue is in initializing the PCIe device, which is failing. This could explain the seemingly random issues people are having.
Another cause:
Different hardware revisions
This one actually seems somewhat likely to me. So, what if Samsung, halfway through production, decided to change their WiFi card model? So, people come from their working stock firmware designed for that hwrev, to a custom ROM, which doesn't work with that wifi device, back to the stock firmware, which could have been pulled from a device with a different hwrev. In theory, this would explain 2 things:
- People having WiFi break on a ROM, and restoring to stock doesn't fix the problem
- In the CM thread, I saw some people having a non-working camera/wifi, and some had a working camera/wifi. If the ROM was compiled for one hwrev, this would explain why.
So, what do you think?
Am I just being crazy here, or is something seriously wrong here?
Please - dump all WiFi issue info here, including logs. I want to get as many logs as I can from different models. You can use Syslog to extract them.
@ashyx seemed to think that a hardware failure was possible, but he wasn't quite sure.
By the way, this is from a T810.
THIS ALSO EXPLAINS WHY some people had working WiFi on the CM12.1/CM13 threads and some didn't. (Also the camera...?)
Possible Causes:
Hardware Failure:
Seems likely. This is all off of memory, but according to @ashyx, the wifi driver uses "pcie_register_driver" to do 2 things:
- Initialize the PCIe device (in this case, the WiFi card)
- Initialize the driver (in this case, the WiFi driver)
According to him, the issue is in initializing the PCIe device, which is failing. This could explain the seemingly random issues people are having.
Another cause:
Different hardware revisions
This one actually seems somewhat likely to me. So, what if Samsung, halfway through production, decided to change their WiFi card model? So, people come from their working stock firmware designed for that hwrev, to a custom ROM, which doesn't work with that wifi device, back to the stock firmware, which could have been pulled from a device with a different hwrev. In theory, this would explain 2 things:
- People having WiFi break on a ROM, and restoring to stock doesn't fix the problem
- In the CM thread, I saw some people having a non-working camera/wifi, and some had a working camera/wifi. If the ROM was compiled for one hwrev, this would explain why.
So, what do you think?
Am I just being crazy here, or is something seriously wrong here?
Please - dump all WiFi issue info here, including logs. I want to get as many logs as I can from different models. You can use Syslog to extract them.
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