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CONFIG_FW_LOADER_USER_HELPER and systemd
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syl22_00
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Joined: 31 Aug 2011
Posts: 14

PostPosted: Mon Apr 27, 2015 2:12 pm    Post subject: CONFIG_FW_LOADER_USER_HELPER and systemd Reply with quote

Just received a systemd update (to sys-apps/systemd-218-r3), which gave the following warning:
Code:
CONFIG_FW_LOADER_USER_HELPER:    should not be set. But it is.


After re-compiling the kernel without that option, and rebooting, my wireless card failed to start (an intel controller using iwlwifi). I have sys-kernel/linux-firmware to deal with kernel binary modules.

Can anyboy point to some resources to help me understand and fix that issue?

Thanks in advance!

Sylvain
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vasettoo
Tux's lil' helper
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Joined: 11 Nov 2012
Posts: 78

PostPosted: Mon Apr 27, 2015 3:03 pm    Post subject: Reply with quote

Follow the suggestion in this post:
https://forums.gentoo.org/viewtopic-p-7721742.html#7721742
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syl22_00
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Joined: 31 Aug 2011
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PostPosted: Tue Apr 28, 2015 8:45 am    Post subject: Reply with quote

Great, thanks a lot for point this out. As I preferred to keep the modules inside the kernel, here is the route I took:
  • With CONFIG_FW_LOADER_USER_HELPER set, looked at the boot logs (journalctl -b) to find out which of the microcode files are needed (they are in /lib64/firmware). Relevant lines start with "Direct firmware load for...".
  • With make menuconfig:

    • Removed "Fallback user-helper invocation for firmware loading".
    • Added "Include in-kernel firmware blobs in kernel binary".
    • Added "/lib64/firmware" as "Firmware blobs root directory".
    • Added the required microcode files in "External firmware blobs to build into the kernel binary".



And that worked well!
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