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Lukiwuki
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PostPosted: Tue Nov 01, 2016 1:02 pm    Post subject: iwlmvm: Unknown symbol dev_coredumpm (err 0) Reply with quote

Hello,

I want to get my WIFI Module (Intel Wireless 7265) to work.

Current Issue:

*** iwlwifi loads
*** iwlmvm fails to load -> Error Code: Unknown symbol dev_coredumpm (err 0)

Things I've already done:

*** Loaded the newest firmware and placed it in /lib/firmware
*** Recompiled my Kernel and my modules
*** Rebootet afterwards.

Kernel 4.4.26-gentoo.
My kernel config (full config avaiable here: http://pastebin.com/epeap0Wt):
Code:
CONFIG_IWLWIFI=m
CONFIG_IWLWIFI_LEDS=y
CONFIG_IWLDVM=m
CONFIG_IWLMVM=m
CONFIG_IWLWIFI_OPMODE_MODULAR=y
# CONFIG_IWLWIFI_BCAST_FILTERING is not set
# CONFIG_IWLWIFI_UAPSD is not set
# CONFIG_IWLWIFI_DEBUG is not set
CONFIG_IWLWIFI_DEVICE_TRACING=y
Code:
CONFIG_COREDUMP=y
CONFIG_WANT_DEV_COREDUMP=y
CONFIG_ALLOW_DEV_COREDUMP=y
CONFIG_DEV_COREDUMP=y
Code:
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
# CONFIG_MODULE_SIG is not set
# CONFIG_MODULE_COMPRESS is not set
CONFIG_MODULES_TREE_LOOKUP=

dmesg output:
Code:
[13406.402497] Intel(R) Wireless WiFi driver for Linux
[13406.402500] Copyright(c) 2003- 2015 Intel Corporation
[13406.402865] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-7265D-19.ucode failed with error -2
[13406.402880] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-7265D-18.ucode failed with error -2
[13406.402885] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-7265D-17.ucode failed with error -2
[13406.403453] iwlwifi 0000:02:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm
[13406.404341] iwlmvm: Unknown symbol dev_coredumpm (err 0)
[13406.409747] iwlwifi 0000:02:00.0: failed to load module iwlmvm (error 256), is dynamic loading enabled?

Dynamic firmware loading build into the kernel, every option i found including "coredump" is too.

In my opinion I'm missing something that has to be installed/configured in order to use dev_coredumpm.
Any suggestions how to fix this? Nothing I found worked.

Thanks for your help!
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Apheus
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PostPosted: Tue Nov 01, 2016 1:45 pm    Post subject: Reply with quote

Try with enabled CONFIG_UNUSED_SYMBOLS.
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Lukiwuki
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PostPosted: Tue Nov 01, 2016 3:09 pm    Post subject: Reply with quote

Apheus wrote:
Try with enabled CONFIG_UNUSED_SYMBOLS.


If I enable UNUSED_SYMBOLS iwlwifi refuses to recognize my device and does not load any firmware.
Additional my USB Ethernet Interface stops working.
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charles17
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PostPosted: Tue Nov 01, 2016 4:18 pm    Post subject: Re: iwlmvm: Unknown symbol dev_coredumpm (err 0) Reply with quote

Lukiwuki wrote:

dmesg output:
Code:
[13406.402497] Intel(R) Wireless WiFi driver for Linux
[13406.402500] Copyright(c) 2003- 2015 Intel Corporation
[13406.402865] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-7265D-19.ucode failed with error -2
[13406.402880] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-7265D-18.ucode failed with error -2
[13406.402885] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-7265D-17.ucode failed with error -2
[13406.403453] iwlwifi 0000:02:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm
[13406.404341] iwlmvm: Unknown symbol dev_coredumpm (err 0)
[13406.409747] iwlwifi 0000:02:00.0: failed to load module iwlmvm (error 256), is dynamic loading enabled?
!

Are you having one of those ucodes listed there in your ls -l /lib/firmware/ | grep -i 7265D?
modinfo iwlwifi should give you some more information.
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Lukiwuki
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PostPosted: Wed Nov 02, 2016 9:11 am    Post subject: Re: iwlmvm: Unknown symbol dev_coredumpm (err 0) Reply with quote

charles17 wrote:

dmesg output:
Code:
[13406.402497] Intel(R) Wireless WiFi driver for Linux
[13406.402500] Copyright(c) 2003- 2015 Intel Corporation
[13406.402865] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-7265D-19.ucode failed with error -2
[13406.402880] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-7265D-18.ucode failed with error -2
[13406.402885] iwlwifi 0000:02:00.0: Direct firmware load for iwlwifi-7265D-17.ucode failed with error -2
[13406.403453] iwlwifi 0000:02:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm
[13406.404341] iwlmvm: Unknown symbol dev_coredumpm (err 0)
[13406.409747] iwlwifi 0000:02:00.0: failed to load module iwlmvm (error 256), is dynamic loading enabled?

Are you having one of those ucodes listed there in your ls -l /lib/firmware/ | grep -i 7265D?
modinfo iwlwifi should give you some more information.


I think he tries to load the iwlwifi-7265D-{17|18|19} firmeware, does not find it and loads iwlwifi-7265-16.ucode/iwlwifi-7265D-16.ucode. This firmware produces the error.

If I check the firmware https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi iwlwifi-7265-ucode-16.242414.0.tgz is the newest firmware for Intel Wireless 7265.

I downloaded the iwlwifi-7265D-{17|18|19} firmeware, from https://github.com/OpenELEC/iwlwifi-firmware/tree/master/firmware, and moved them to /lib/firmware.
Now the leading errors disappear, but the iwlmvm error stays.

Code:
[ 1515.440212] Intel(R) Wireless WiFi driver for Linux
[ 1515.440213] Copyright(c) 2003- 2015 Intel Corporation
[ 1515.441032] iwlwifi 0000:02:00.0: loaded firmware version 19.324151.0 op_mode iwlmvm
[ 1515.441864] iwlmvm: Unknown symbol dev_coredumpm (err 0)
[ 1515.448057] iwlwifi 0000:02:00.0: failed to load module iwlmvm (error 256), is dynamic loading enabled?



"ls -l /lib/firmware | grep iwlwifi"
Code:
iwlwifi-1000-3.ucode
iwlwifi-1000-5.ucode
iwlwifi-100-5.ucode
iwlwifi-105-6.ucode
iwlwifi-135-6.ucode
iwlwifi-2000-6.ucode
iwlwifi-2030-6.ucode
iwlwifi-3160-10.ucode
iwlwifi-3160-12.ucode
iwlwifi-3160-13.ucode
iwlwifi-3160-16.ucode
iwlwifi-3160-7.ucode
iwlwifi-3160-8.ucode
iwlwifi-3160-9.ucode
iwlwifi-3168-21.ucode
iwlwifi-3945-2.ucode
iwlwifi-4965-2.ucode
iwlwifi-5000-1.ucode
iwlwifi-5000-2.ucode
iwlwifi-5000-5.ucode
iwlwifi-5150-2.ucode
iwlwifi-6000-4.ucode
iwlwifi-6000g2a-5.ucode
iwlwifi-6000g2a-6.ucode
iwlwifi-6000g2b-5.ucode
iwlwifi-6000g2b-6.ucode
iwlwifi-6050-4.ucode
iwlwifi-6050-5.ucode
iwlwifi-7260-10.ucode
iwlwifi-7260-12.ucode
iwlwifi-7260-13.ucode
iwlwifi-7260-16.ucode
iwlwifi-7260-7.ucode
iwlwifi-7260-8.ucode
iwlwifi-7260-9.ucode
iwlwifi-7265-10.ucode
iwlwifi-7265-12.ucode
iwlwifi-7265-13.ucode
iwlwifi-7265-16.ucode
iwlwifi-7265-17.ucode
iwlwifi-7265-8.ucode
iwlwifi-7265-9.ucode
iwlwifi-7265D-10.ucode
iwlwifi-7265D-12.ucode
iwlwifi-7265D-13.ucode
iwlwifi-7265D-16.ucode
iwlwifi-7265D-17.ucode
iwlwifi-7265D-18.ucode
iwlwifi-7265D-19.ucode
iwlwifi-8000C-13.ucode
iwlwifi-8000C-16.ucode
iwlwifi-8000C-21.ucode
iwlwifi-8265-21.ucode
LICENCE.iwlwifi_firmware
LICENSE.iwlwifi-7265-ucode


"modinfo iwlwifi"
Code:
filename:       /lib/modules/4.4.26-gentoo/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
license:        GPL
author:         Copyright(c) 2003- 2015 Intel Corporation <ilw@linux.intel.com>
description:    Intel(R) Wireless WiFi driver for Linux
firmware:       iwlwifi-100-5.ucode
firmware:       iwlwifi-1000-5.ucode
firmware:       iwlwifi-135-6.ucode
firmware:       iwlwifi-105-6.ucode
firmware:       iwlwifi-2030-6.ucode
firmware:       iwlwifi-2000-6.ucode
firmware:       iwlwifi-5150-2.ucode
firmware:       iwlwifi-5000-5.ucode
firmware:       iwlwifi-6000g2b-6.ucode
firmware:       iwlwifi-6000g2a-5.ucode
firmware:       iwlwifi-6050-5.ucode
firmware:       iwlwifi-6000-4.ucode
firmware:       iwlwifi-7265D-13.ucode
firmware:       iwlwifi-7265-13.ucode
firmware:       iwlwifi-3160-13.ucode
firmware:       iwlwifi-7260-13.ucode
firmware:       iwlwifi-8000-13.ucode
alias:          pci:v00008086d000024F3sv*sd00000930bc*sc*i*
... more aliases
alias:          pci:v00008086d00004232sv*sd00001201bc*sc*i*
depends:       
intree:         Y
vermagic:       4.4.26-gentoo SMP mod_unload
parm:           swcrypto:using crypto in software (default 0 [hardware]) (int)
parm:           11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
parm:           amsdu_size_8K:enable 8K amsdu size (default 0) (int)
parm:           fw_restart:restart firmware in case of error (default true) (bool)
parm:           antenna_coupling:specify antenna coupling in dB (default: 0 dB) (int)
parm:           nvm_file:NVM file name (charp)
parm:           d0i3_disable:disable d0i3 functionality (default: Y) (bool)
parm:           lar_disable:disable LAR functionality (default: N) (bool)
parm:           uapsd_disable:disable U-APSD functionality (default: Y) (bool)
parm:           bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
parm:           led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
parm:           power_save:enable WiFi power management (default: disable) (bool)
parm:           power_level:default power save level (range from 1 - 5, default: 1) (int)
parm:           fw_monitor:firmware monitor - to debug FW (default: false - needs lots of memory) (bool)
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charles17
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PostPosted: Wed Nov 02, 2016 12:44 pm    Post subject: Reply with quote

Did you see topic 1011698?
Maybe doing this again after kernel changes could help?
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Lukiwuki
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PostPosted: Wed Nov 02, 2016 12:59 pm    Post subject: Reply with quote

charles17 wrote:
Did you see topic 1011698?
Maybe doing this again after kernel changes could help?


This is my comand history:
Code:
cd /usr/src/linux
make menuconfig
make -j5
make modules_install
make install
grub-mkconfig -o /boot/grub/grub.cfg
reboot


I do thing that covers topic 1011698. If I'm wrong and missing something please let me know.

Edit1: Additionally I think if you're just recompiling your Kernel and staying on the same Version you can skip "grub-mkconfig -o /boot/grub/grub.cfg".
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charles17
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PostPosted: Wed Nov 02, 2016 8:28 pm    Post subject: Reply with quote

Lukiwuki wrote:
I do thing that covers topic 1011698. If I'm wrong and missing something please let me know.
Forgot to mount /boot ?
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Lukiwuki
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PostPosted: Thu Nov 03, 2016 8:48 am    Post subject: Reply with quote

charles17 wrote:
Lukiwuki wrote:
I do thing that covers topic 1011698. If I'm wrong and missing something please let me know.
Forgot to mount /boot ?


Boot mounts at startup.
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F_
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PostPosted: Thu Nov 17, 2016 6:17 pm    Post subject: Reply with quote

Was there any resolution to this?
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NeddySeagoon
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PostPosted: Thu Nov 17, 2016 6:56 pm    Post subject: Reply with quote

Looking for dev_coredumpm in the kernel shows
Code:
$ cd /usr/src/linux
roy@NeddySeagoon_Static /usr/src/linux $ grep -R dev_coredumpm ./
./drivers/base/devcoredump.c: * it when it is no longer used. See dev_coredumpm() for more information.
./drivers/base/devcoredump.c:   dev_coredumpm(dev, NULL, data, datalen, gfp, devcd_readv, devcd_freev);
./drivers/base/devcoredump.c: * dev_coredumpm - create device coredump with read/free methods
./drivers/base/devcoredump.c:void dev_coredumpm(struct device *dev, struct module *owner,
./drivers/base/devcoredump.c:EXPORT_SYMBOL_GPL(dev_coredumpm);
./drivers/base/devcoredump.c: * dev_coredumpmsg - create device coredump that uses scatterlist as data
./drivers/base/devcoredump.c:   dev_coredumpm(dev, NULL, table, datalen, gfp, devcd_read_from_sgtable,
./drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c:   dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
./include/linux/devcoredump.h:void dev_coredumpm(struct device *dev, struct module *owner,
./include/linux/devcoredump.h:dev_coredumpm(struct device *dev, struct module *owner,

The key line there is
Code:
./drivers/base/devcoredump.c:EXPORT_SYMBOL_GPL(dev_coredumpm);
so whatever kernel option builds the file /drivers/base/devcoredump.c must be on. =m or =y will do

Looking at ./drivers/base/Kconfig tells

Code:
config WANT_DEV_COREDUMP
        bool
        help
          Drivers should "select" this option if they desire to use the
          device coredump mechanism.

config ALLOW_DEV_COREDUMP
        bool "Allow device coredump" if EXPERT
        default y
        help
          This option controls if the device coredump mechanism is available or
          not; if disabled, the mechanism will be omitted even if drivers that
          can use it are enabled.
          Say 'N' for more sensitive systems or systems that don't want
          to ever access the information to not have the code, nor keep any
          data.

          If unsure, say Y.

config DEV_COREDUMP
        bool
        default y if WANT_DEV_COREDUMP
        depends on ALLOW_DEV_COREDUMP


We need ALLOW_DEV_COREDUMP, bul that's hidden unless EXPERT is set.

In menuconfig search (press /) for EXPERT, go there and enable it.
Now search for DEV_COREDUMP and enable it too.

Rebuild and reinstall your kernel. Reboot.
Look at the time/date in uname -a
That's the time/date the running kernel was built. It should be nowish or you messed up the kernel install.
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