Re: Intel AC7260 problems

The following was originally posted to Re: Intel Wireless-N 7260 fails to connect WLAN and Bluetooth with Windows 8.1 and reposted here (deleting the original) since it pertains to Win7 not 8.1.

July 7, 2014:

After upgrading the wireless and installing the Bluetooth 4.0 driver, my 7260 now loses the connection when resuming from sleep. Win 7 will not reconnect on its own. Disabling & enabling the 7260 brings the wireless back. This is a pain, I will probably downgrade back to 16.1.5.2 (again).

Intel Bluetooth driver 17.0.1405.456

Intel 7260 driver 17.0.5.8 (Upgraded from 16.1.5.2)

The 7260 bluetooth driver typically doesn’t load by itself from a cold start or reboot. Disabling and enabling the USB Enh Host Ctrllr - 3B34 causes the Bluetooth to start. The Bluetooth will also work with just the generic win 7 bluetooth driver (without the Intel ProSet driver). I have yet to figure out what the circumstances are when it does load itself from a cold start.

Wifi sync speeds with the 17.05.8 driver are still somewhat unstable, but don’t jump around as much as the v16 and driver. They also seem to rise when checking the sync speed as reported by win 7. Transmission rates seem to be fast when actually receiving and transmitting large amounts of data.

Long latency pings (to the router) are much less frequent with v17 occuring inconsistently  every 1-2x every 30-100 or so pings. Some times have been as long as 1600 ms; typically they are 1-2 ms.

Lenovo T510 laptop (no discrete Bluetooth card), de-whitelisted bios--no other modifications or problems; win 7 64-bit; ASUS RT-ac66r router.

7260 Hardware ID

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Bluetooth hardware ID

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Device Manager after cold start

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Device Manager after disabling/enabling host controller

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Update 8/10/2014

The latst Bluetooth driver (v.17.1.1406.01) does not properly load upon cold start. Disabling/Enabling Intel(R) 5 Series/3400 Series Chipset Family USB Enhanced Host Controller - 3B34 in the device manager takes care of that. The Bluetooth cannot be turned off and on via the driver. This laptop did not come with Bluetooth and the bios may be part of the problem as far as this is concerned. However, the prior driver (17.0.1405.456) while also not loading upon cold start, would allow the Bluetooth to be turned off and on via task bar button and options.

After installing the v.17.0.5.8 wi-fi driver (one month ago), the 7240 did not consistently reconnect upon resuming from sleep.  Before giving up and downgrading the driver, I noticed that the option “Allow the computer to turn off this device to save power” was checked (what is the default setting on the driver?). I unchecked it and also uninstalled the Lenovo Thinkvantage Access Connections utility that I never used. I don’t know how it works, but since it is network related, I thought “let’s see what happens if it’s gone.” Since then, about 6 days ago, I have had no problems with lost connections after resuming from sleep.

The driver settings for the network card are as follows. I am running Win 7 x64 and using an RT-ac66 router.