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Bug#1028547: MT7921e firmware blob exists but is not found
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Jamie Wilkinson
Mar 6, 2023, 11:00:04 PM3/6/23
to
I am installing on an Asus PN51-E1 which includes the Mediatek MT7921e
wifi device.
I came across this bug while trying to install from
https://cdimage.debian.org/cdimage/bookworm_di_alpha2/ netinst iso on
a USB stick.
I see the same error, but what I was trying to debug when I arrived at
this bug is why we see the error in dmesg:
mt7921e 0000:05:00.0: firmware: failed to load
mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin (-2)
because when I break to the console in the installer, I see in
/lib/firmware this very file:
~ # ls /lib/firmware/mediatek/WIFI_*
WIFI_MT7922_patch_mcu_1_1_hdr.bin
WIFI_MT7961_patch_mcu_1_2_hdr.bin
WIFI_RAM_CODE_MT7922_1.bin
WIFI_RAM_CODE_MT7961_1.bin
When I tried again in Expert install mode, I looked before detecting
network devices, and saw that /lib/firmware was empty. What's
populating this directory? Is it a chroot and thus the kernel module
can't see it? Or... is the kernel module looking in a different path?
wifi device.
I came across this bug while trying to install from
https://cdimage.debian.org/cdimage/bookworm_di_alpha2/ netinst iso on
a USB stick.
I see the same error, but what I was trying to debug when I arrived at
this bug is why we see the error in dmesg:
mt7921e 0000:05:00.0: firmware: failed to load
mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin (-2)
because when I break to the console in the installer, I see in
/lib/firmware this very file:
~ # ls /lib/firmware/mediatek/WIFI_*
WIFI_MT7922_patch_mcu_1_1_hdr.bin
WIFI_MT7961_patch_mcu_1_2_hdr.bin
WIFI_RAM_CODE_MT7922_1.bin
WIFI_RAM_CODE_MT7961_1.bin
When I tried again in Expert install mode, I looked before detecting
network devices, and saw that /lib/firmware was empty. What's
populating this directory? Is it a chroot and thus the kernel module
can't see it? Or... is the kernel module looking in a different path?
Cyril Brulebois
Mar 6, 2023, 11:50:05 PM3/6/23
to
Jamie Wilkinson <j...@debian.org> (2023-03-07):
d-i notices, and deploys stuff if relevant firmware packages are found,
and reload the relevant modules. This reloading is what breaks the
kernel. See upstream bug report:
https://bugzilla.kernel.org/show_bug.cgi?id=216844
> because when I break to the console in the installer, I see in
> /lib/firmware this very file:
>
> ~ # ls /lib/firmware/mediatek/WIFI_*
> WIFI_MT7922_patch_mcu_1_1_hdr.bin
> WIFI_MT7961_patch_mcu_1_2_hdr.bin
> WIFI_RAM_CODE_MT7922_1.bin
> WIFI_RAM_CODE_MT7961_1.bin
That's expected after an initial check-missing-firmware run.
> When I tried again in Expert install mode, I looked before detecting
> network devices, and saw that /lib/firmware was empty. What's
> populating this directory? Is it a chroot and thus the kernel module
> can't see it? Or... is the kernel module looking in a different path?
You can check /var/log/syslog, looking for check-missing-firmware lines.
You'll see what it notices, and does.
Cheers,
--
Cyril Brulebois (ki...@debian.org) <https://debamax.com/>
D-I release manager -- Release team member -- Freelance Consultant
> I am installing on an Asus PN51-E1 which includes the Mediatek MT7921e
> wifi device.
>
> I came across this bug while trying to install from
> https://cdimage.debian.org/cdimage/bookworm_di_alpha2/ netinst iso on
> a USB stick.
>
> I see the same error, but what I was trying to debug when I arrived at
> this bug is why we see the error in dmesg:
>
> mt7921e 0000:05:00.0: firmware: failed to load
> mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin (-2)
That's expected: no firmware is deployed at first, the kernel complains,
> wifi device.
>
> I came across this bug while trying to install from
> https://cdimage.debian.org/cdimage/bookworm_di_alpha2/ netinst iso on
> a USB stick.
>
> I see the same error, but what I was trying to debug when I arrived at
> this bug is why we see the error in dmesg:
>
> mt7921e 0000:05:00.0: firmware: failed to load
> mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin (-2)
d-i notices, and deploys stuff if relevant firmware packages are found,
and reload the relevant modules. This reloading is what breaks the
kernel. See upstream bug report:
https://bugzilla.kernel.org/show_bug.cgi?id=216844
> because when I break to the console in the installer, I see in
> /lib/firmware this very file:
>
> ~ # ls /lib/firmware/mediatek/WIFI_*
> WIFI_MT7922_patch_mcu_1_1_hdr.bin
> WIFI_MT7961_patch_mcu_1_2_hdr.bin
> WIFI_RAM_CODE_MT7922_1.bin
> WIFI_RAM_CODE_MT7961_1.bin
> When I tried again in Expert install mode, I looked before detecting
> network devices, and saw that /lib/firmware was empty. What's
> populating this directory? Is it a chroot and thus the kernel module
> can't see it? Or... is the kernel module looking in a different path?
You'll see what it notices, and does.
Cheers,
--
Cyril Brulebois (ki...@debian.org) <https://debamax.com/>
D-I release manager -- Release team member -- Freelance Consultant
Jamie Wilkinson
Mar 7, 2023, 8:50:04 PM3/7/23
to
Thankyou for this part of your reply:
That's expected: no firmware is deployed at first, the kernel complains,
d-i notices, and deploys stuff if relevant firmware packages are found,
and reload the relevant modules. This reloading is what breaks the
kernel. See upstream bug report:
https://bugzilla.kernel.org/show_bug.cgi?id=216844
as that was an actually useful response, and explains why check-missing-firmware never got invoked.
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