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Princess Nell
l33t
Joined: 15 Apr 2005
Posts: 931
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 Posted: Thu Jul 08, 2021 11:39 pm Post subject: Dracut and firmware |
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Reviewing https://wiki.gentoo.org/wiki/Intel, I found that the Intel DMC firmware wasn't loading, exactly as shown under the "Installation" heading. Not a problem, I added it to the dracut config, rebuilt initramfs, and it's loading now, fine.
The interesting part is the other firmwares also included in the initrams.
| Code: |
lsinitrd initramfs.img|grep firmw
drwxr-xr-x 4 root root 0 Jul 8 23:06 lib/firmware
drwxr-xr-x 2 root root 0 Jul 8 23:06 lib/firmware/cis
-rw-r--r-- 1 root root 137 Jun 29 21:59 lib/firmware/cis/3CCFEM556.cis
-rw-r--r-- 1 root root 134 Jun 29 21:59 lib/firmware/cis/3CXEM556.cis
-rw-r--r-- 1 root root 109 Jun 29 21:59 lib/firmware/cis/COMpad2.cis
-rw-r--r-- 1 root root 76 Jun 29 21:59 lib/firmware/cis/COMpad4.cis
-rw-r--r-- 1 root root 136 Jun 29 21:59 lib/firmware/cis/DP83903.cis
-rw-r--r-- 1 root root 107 Jun 29 21:59 lib/firmware/cis/MT5634ZLX.cis
-rw-r--r-- 1 root root 210 Jun 29 21:59 lib/firmware/cis/PCMLM28.cis
-rw-r--r-- 1 root root 86 Jun 29 21:59 lib/firmware/cis/RS-COM-2P.cis
-rw-r--r-- 1 root root 122 Jun 29 21:59 lib/firmware/cis/SW_555_SER.cis
-rw-r--r-- 1 root root 140 Jun 29 21:59 lib/firmware/cis/SW_7xx_SER.cis
-rw-r--r-- 1 root root 132 Jun 29 21:59 lib/firmware/cis/SW_8xx_SER.cis
drwxr-xr-x 2 root root 0 Jul 8 23:06 lib/firmware/i915
-rw-r--r-- 1 root root 8928 Jun 29 21:59 lib/firmware/i915/skl_dmc_ver1_27.bin
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I'm surprised to see all these seemingly obsolete firmwares - 3COM, PCMCIA etc. Certainly quite unrelated to my actual hw.
How does dracut decide to include them? How can I stop it from doing that (I don't see an omit_items option)? |
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Princess Nell
l33t
Joined: 15 Apr 2005
Posts: 931
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| Posted: Mon Jul 12, 2021 10:12 pm Post subject: |
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The answer is: these firmware files are loaded by the 8250/serial_cs driver, which for some reason is enabled in my kernel config.
| Code: | # dmesg|grep -i serial
[ 0.416887] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
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Kernel & Hardware
