>
> Hi Janusz,
>
> >
> > Hello,
> >
> > I have intel7260 connected via external PCIe + DELL latitude e6430.
> >
> > [ 5199.805417] iwlwifi 0000:04:00.0: enabling device (0100 -> 0102) [
> > 5199.809222] iwlwifi 0000:04:00.0: loaded firmware version
> > 17.275772.0 op_mode iwlmvm
> > [ 5199.819548] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band
> > Wireless AC 7260, REV=0x144 [ 5199.819658] iwlwifi 0000:04:00.0: L1
> > Enabled - LTR Disabled [ 5199.820018] iwlwifi 0000:04:00.0: L1 Enabled
> > - LTR Disabled [ 5200.012786] ieee80211 phy0: Selected rate control
> algorithm 'iwl-mvm-rs'
> > [ 5200.020148] iwlwifi 0000:04:00.0 wlan3: renamed from wlan0
> >
> > [ 5282.743987] iwlwifi 0000:04:00.0: L1 Enabled - LTR Disabled [
> > 5282.781812] -- ----------[ cut here ]------------ [ 5282.781823]
> > WARNING: CPU: 3 PID: 3760 at
> > drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1561
> > iwl_trans_pcie_grab_nic_access+0xe6/0xf0 [iwlwifi]() [ 5282.781824]
> > Timeout waiting for hardware access (CSR_GP_CNTRL 0xffffffff) [
>
> Well... you are not the only one to complain about this issue and
> unfortunately, there isn't much I can do. What it means is that the device is
> removed from the bus by the PCIe controller. This happens due to an
> electrical problem which I can't really help with. This can be caused by
> different types of voodoos, like interference on the PCIe lines and other
> things that can't really be root caused without taking the system into the lab
> and adding PCIe analyzer probes.
> I am afraid I can't really help.
> As a workaround, you can unbind the device from the bus and re-
> enumerate. This will bring the device back... until the next failure.
One thing that come through my mind is that you can try to disable power save (power_sheme=1 as a module parameter to iwlmvm) which will prevent LX power state entrance and might reduce the noise on the PCIe lines. Worth trying.
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