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docs: correct the firmware split — graphics needs a Windows blob too

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I had this wrong. The claim that accelerated graphics works on the firmware
Fedora ships does not survive contact with the device tree.

Fedora does package an sdm845/a630_zap.mbn, which is what led me astray, but
that is the generic Snapdragon 845 zap shader. The C630's node in
sdm850-lenovo-yoga-c630.dts names qcom/sdm850/LENOVO/81JL/qcdxkmsuc850.mbn
specifically — model-signed, present only in the machine's Windows partition.
Until it is supplied the display is unaccelerated.

Also add qcslpi850.mbn and qcvss850.mbn, which were missing entirely, and
attribute the sensor hub to slpi_pas rather than cdsp_pas. The list is now
every firmware-name property in the mainline device tree rather than a
recollection of forum posts, so it should be complete: eight files, not five.

WiFi and Bluetooth are unaffected — ath10k WCN3990 including wlanmdsp.mbn is
genuinely redistributable and genuinely shipped.

Add a section on locating the blobs on an old backup, for the case where
Windows is long gone from the machine.

Only comments changed in config/packages/base.pkgs, so the package set hashes
identically and the staged base stays valid.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XWRjNJMistCy6ngXH5aJLS
This commit is contained in:
rob thijssen
2026-07-27 12:51:01 +03:00
parent d168df0977
commit 3762f13d8b
6 changed files with 90 additions and 37 deletions
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7
docs/install.md
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@@ -4,8 +4,8 @@
Leave Windows in place. Lenovo ships firmware updates only through Windows, and
the per-model Qualcomm blobs Linux needs live in that partition — wiping it
means losing audio and the sensor hub permanently. Update everything through
Lenovo Vantage first.
means losing accelerated graphics, audio and the sensor hub permanently.
Update everything through Lenovo Vantage first.
Disable Secure Boot. The image is not signed for it:
@@ -37,7 +37,8 @@ grows the root partition. Several minutes on a USB stick is normal. Log in as
## Extract the Qualcomm firmware
Audio, the sensor hub and video decode do not work until you do this:
Accelerated graphics, audio, the sensor hub and video decode do not work
until you do this:
```sh
sudo c630-firmware