Re: Intel Wireless 7260 failed to work

From: Larry Finger
Date: Tue Dec 27 2016 - 11:41:39 EST

On 12/27/2016 03:17 AM, Peter Xu wrote:

Looks like latest Linux master (4.10-rc1, 7ce7d89f) cannot work well
with my wireless card, which is:

Intel Corporation Wireless 7260 (rev bb)

Boot message shows that no suitable firmware found:

# journalctl -kp3
Dec 27 16:38:00 kernel: Error parsing PCC subspaces from PCCT
Dec 27 16:38:00 kernel: mmc0: Unknown controller version (3). You may experience problems.
Dec 27 16:38:02 kernel: DMAR: DRHD: handling fault status reg 2
Dec 27 16:38:02 kernel: DMAR: [DMA Write] Request device [00:02.0] fault addr 7200000000 [fault reason 05] PTE Write a
Dec 27 16:38:03 kernel: tpm tpm0: A TPM error (6) occurred attempting to read a pcr value
Dec 27 16:38:04 kernel: iwlwifi 0000:03:00.0: no suitable firmware found!

Linux stable/master (Linux 4.8-rc8, 08895a8b6b) works for me. And no
further tests have been done yet.

Is this a known issue? Please let me know if anyone wants more info or
logs, since this error triggers easily (everytime I boot).

The problem appears to be specific for your system. On my Toshiba Tecra A50A, kernel 4.10-rc1 the driver works the same as in earlier kernels. The dmesg log shows the following:

[ 4.760600] Intel(R) Wireless WiFi driver for Linux
[ 4.760601] Copyright(c) 2003- 2015 Intel Corporation
[ 4.799519] iwlwifi 0000:04:00.0: loaded firmware version 17.352738.0 op_mode iwlmvm
[ 4.880820] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144
[ 4.883340] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled
[ 4.883584] iwlwifi 0000:04:00.0: L1 Enabled - LTR Enabled

I'm not sure if the driver would look for firmware version 16 if 17 would not be available, but I think it would.

Check for firmware file /lib/firmware/iwlwifi-7260-17.ucode. If that is not present for your distro, it is in the repo at git://

If that firmware is present, or if adding it does not help, my next suggestion is to bisect between 4.8 and the current version to see where the problem was introduced. I would not limit the bisection to the Intel wireless drivers as the problem could be in the underlying PCIe support for your hardware. By the way, that bisection will require about 14 steps.