Intel Wireless 7260 failed to work

Intel Wireless 7260 failed to work

[Peter Xu]

Hello,

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).

Thanks,

-- peterx

Re: Intel Wireless 7260 failed to work

[Larry Finger]

On 12/27/2016 03:17 AM, Peter Xu wrote:
> Hello,
>
> 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://git.kernel.org/pub/scm/linux/kernel/git/dwmw2/linux-firmware.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.

Larry

Re: Intel Wireless 7260 failed to work

[Kalle Valo]

Peter Xu <peterx@redhat.com> writes:

> 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 error message isn't really telling much to the user (hint hint) but
I suspect this is by design:

"iwlwifi: remove support for fw older than -17 and -22

FW versions older than -17 for 3160 and 7260 and older than -22 for
newer NICs are not supported anymore.  Don't load these versions
and remove code that handles them."

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4b87e5af638b6056bd6c20b0954d09a5a58633be

Adding luca.

-- 
Kalle Valo

Re: Intel Wireless 7260 failed to work

[Peter Xu]

On Tue, Dec 27, 2016 at 10:41:22AM -0600, Larry Finger wrote:
> On 12/27/2016 03:17 AM, Peter Xu wrote:
> >Hello,
> >
> >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://git.kernel.org/pub/scm/linux/kernel/git/dwmw2/linux-firmware.git.

This is useful. :-)

Putting iwlwifi-7260-17.ucode into /lib/firmware fixes my issue.

Thanks for the link!

-- peterx

Re: Intel Wireless 7260 failed to work

[Peter Xu]

On Tue, Dec 27, 2016 at 09:46:55PM +0200, Kalle Valo wrote:
> Peter Xu <peterx@redhat.com> writes:
> 
> > 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 error message isn't really telling much to the user (hint hint) but
> I suspect this is by design:
> 
> "iwlwifi: remove support for fw older than -17 and -22
> 
> FW versions older than -17 for 3160 and 7260 and older than -22 for
> newer NICs are not supported anymore.  Don't load these versions
> and remove code that handles them."
> 
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4b87e5af638b6056bd6c20b0954d09a5a58633be
> 
> Adding luca.

Thanks for the triage.

Larry's link for -17 firmware solved my issue. Though I still don't
know whether it is too aggresive if we just remove the support for -16
(which is the one I was using with the old 4.6 kernel, btw I am using
Fedora 24, which is relatively new as well).

Regards,

-- peterx

Re: Intel Wireless 7260 failed to work

[Luca Coelho]

On Wed, 2016-12-28 at 11:59 +0800, Peter Xu wrote:
> On Tue, Dec 27, 2016 at 09:46:55PM +0200, Kalle Valo wrote:
> > Peter Xu <peterx@redhat.com> writes:
> > 
> > > 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 error message isn't really telling much to the user (hint hint) but
> > I suspect this is by design:
> > 
> > "iwlwifi: remove support for fw older than -17 and -22

Right, we only maintain support for a certain number of firmware
versions.  The FW APIs change with time and we don't want to keep all
legacy code supporting old firmwares in the driver forever.

I agree that "no suitable firmware found!" is a bit scarce.  I'll see
if we can improve that with something: "no suitable firmware found! You
need iwlwifi-7260-17.ucode (<link to git>)".


> > FW versions older than -17 for 3160 and 7260 and older than -22 for
> > newer NICs are not supported anymore.  Don't load these versions
> > and remove code that handles them."
> > 
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4b87e5af638b6056bd6c20b0954d09a5a58633be
> > 
> > Adding luca.
> 
> Thanks for the triage.
> 
> Larry's link for -17 firmware solved my issue. Though I still don't
> know whether it is too aggresive if we just remove the support for -16
> (which is the one I was using with the old 4.6 kernel, btw I am using
> Fedora 24, which is relatively new as well).

I don't think we are very aggressive, we have been supporting -17 since
v4.3:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5865f3658ba37c54e346b0fdee08a1c7a152681b

And we have published the firmware about half a year ago:

http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/commit/iwlwifi-7260-17.ucode?id=f2cf4d67e8eced29c8a473d3a27057aa2df57c42

I understand your concern, but if you want to be on the bleeding-edge
kernel, you should be on the bleeding-edge linux-firmware as well. ;)

But as I said, I'll try to improve the error message, as that should
make it easier to figure out.

--
Cheers,
Luca.

Re: Intel Wireless 7260 failed to work

[Peter Xu]

On Wed, Dec 28, 2016 at 09:27:15AM +0200, Luca Coelho wrote:

[...]

> > > > 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 error message isn't really telling much to the user (hint hint) but
> > > I suspect this is by design:
> > > 
> > > "iwlwifi: remove support for fw older than -17 and -22
> 
> Right, we only maintain support for a certain number of firmware
> versions.  The FW APIs change with time and we don't want to keep all
> legacy code supporting old firmwares in the driver forever.
> 
> I agree that "no suitable firmware found!" is a bit scarce.  I'll see
> if we can improve that with something: "no suitable firmware found! You
> need iwlwifi-7260-17.ucode (<link to git>)".

That'll be great if we can have this info in the log. Maybe no need
for a full URL, the firmware name would suffice at least for me.

[...]

> I don't think we are very aggressive, we have been supporting -17 since
> v4.3:
> 
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5865f3658ba37c54e346b0fdee08a1c7a152681b
> 
> And we have published the firmware about half a year ago:
> 
> http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/commit/iwlwifi-7260-17.ucode?id=f2cf4d67e8eced29c8a473d3a27057aa2df57c42
> 
> I understand your concern, but if you want to be on the bleeding-edge
> kernel, you should be on the bleeding-edge linux-firmware as well. ;)

Fair enough. :-)

> 
> But as I said, I'll try to improve the error message, as that should
> make it easier to figure out.

Thank you!

-- peterx

Re: Intel Wireless 7260 failed to work

[Emmanuel Grumbach]

On Wed, Dec 28, 2016 at 10:10 AM, Peter Xu <peterx@redhat.com> wrote:
> On Wed, Dec 28, 2016 at 09:27:15AM +0200, Luca Coelho wrote:
>
> [...]
>
>> > > > 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 error message isn't really telling much to the user (hint hint) but
>> > > I suspect this is by design:
>> > >
>> > > "iwlwifi: remove support for fw older than -17 and -22
>>
>> Right, we only maintain support for a certain number of firmware
>> versions.  The FW APIs change with time and we don't want to keep all
>> legacy code supporting old firmwares in the driver forever.
>>
>> I agree that "no suitable firmware found!" is a bit scarce.  I'll see
>> if we can improve that with something: "no suitable firmware found! You
>> need iwlwifi-7260-17.ucode (<link to git>)".
>
> That'll be great if we can have this info in the log. Maybe no need
> for a full URL, the firmware name would suffice at least for me.

In this case, I think we should also print the range that is supported
when we fail to find any suitable firmware.

>
> [...]
>
>> I don't think we are very aggressive, we have been supporting -17 since
>> v4.3:
>>
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5865f3658ba37c54e346b0fdee08a1c7a152681b
>>
>> And we have published the firmware about half a year ago:
>>
>> http://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git/commit/iwlwifi-7260-17.ucode?id=f2cf4d67e8eced29c8a473d3a27057aa2df57c42
>>
>> I understand your concern, but if you want to be on the bleeding-edge
>> kernel, you should be on the bleeding-edge linux-firmware as well. ;)
>
> Fair enough. :-)
>
>>
>> But as I said, I'll try to improve the error message, as that should
>> make it easier to figure out.
>
> Thank you!
>
> -- peterx

Re: Intel Wireless 7260 failed to work

[Luca Coelho]

On Wed, 2016-12-28 at 10:17 +0200, Emmanuel Grumbach wrote:
> On Wed, Dec 28, 2016 at 10:10 AM, Peter Xu <peterx@redhat.com> wrote:
> > On Wed, Dec 28, 2016 at 09:27:15AM +0200, Luca Coelho wrote:
> > 
> > [...]
> > 
> > > > > > 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 error message isn't really telling much to the user (hint hint) but
> > > > > I suspect this is by design:
> > > > > 
> > > > > "iwlwifi: remove support for fw older than -17 and -22
> > > 
> > > Right, we only maintain support for a certain number of firmware
> > > versions.  The FW APIs change with time and we don't want to keep all
> > > legacy code supporting old firmwares in the driver forever.
> > > 
> > > I agree that "no suitable firmware found!" is a bit scarce.  I'll see
> > > if we can improve that with something: "no suitable firmware found! You
> > > need iwlwifi-7260-17.ucode (<link to git>)".
> > 
> > That'll be great if we can have this info in the log. Maybe no need
> > for a full URL, the firmware name would suffice at least for me.
> 
> In this case, I think we should also print the range that is supported
> when we fail to find any suitable firmware.

Sure, I'll do that.  I just wanted to keep it simple in this thread. ;)

--
Luca.

Re: Intel Wireless 7260 failed to work

[Kalle Valo]

Luca Coelho <luca@coelho.fi> writes:

> On Wed, 2016-12-28 at 11:59 +0800, Peter Xu wrote:
>> On Tue, Dec 27, 2016 at 09:46:55PM +0200, Kalle Valo wrote:
>> > Peter Xu <peterx@redhat.com> writes:
>> > 
>> > > 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 error message isn't really telling much to the user (hint hint) but
>> > I suspect this is by design:
>> > 
>> > "iwlwifi: remove support for fw older than -17 and -22
>
> Right, we only maintain support for a certain number of firmware
> versions.  The FW APIs change with time and we don't want to keep all
> legacy code supporting old firmwares in the driver forever.
>
> I agree that "no suitable firmware found!" is a bit scarce.  I'll see
> if we can improve that with something: "no suitable firmware found! You
> need iwlwifi-7260-17.ucode (<link to git>)".

Yeah, something like that would be much more helpful for the user.

-- 
Kalle Valo