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--- doc:appunti:hardware:rtl8852be_on_debian_12 [2024/10/04 12:07] – [Creating the dkms source package into the chroot] niccolo
+++ doc:appunti:hardware:rtl8852be_on_debian_12 [2024/10/04 15:04] (current) – [RTL8852BE WiFi adapter on Debian 12 Bookworm] niccolo
@@ Line 8: / Line 8: @@
   * Download and install the **rtw8852b_fw-1.bin** firmware.
+{{ .:mini_pc_t9plus:ami-bios-secure-boot.jpg?200|Secure Boot in BIOS}}
 A **self compiled kernel module** is strictly tied to the running kernel, so **it must be re-compiled** whenever the kernel package is upgraded. The official Debian kernel is properly signed, so it runs even if the **Secure Boot** option is enabled into the BIOS. But the self compiled kernel module is a non-trusted software running at kernel level, so it requires that the Secure Boot into the BIOS to be disabled.
@@ Line 89: / Line 90: @@
 mokutil --sb-state
 SecureBoot enabled
+</code>
+===== Providing the firmware =====
+If you have installed the non-free Debian package **firmware-realtek**, the kernel module will automatically load the **/lib/firmware/rtw89/rtw8852b_fw.bin**, as logged by the kernel:
+<code>
+rtw89_8852be 0000:02:00.0: firmware: failed to load rtw89/rtw8852b_fw-1.bin (-2)
+rtw89_8852be 0000:02:00.0: firmware: failed to load rtw89/rtw8852b_fw-1.bin (-2)
+rtw89_8852be 0000:02:00.0: Direct firmware load for rtw89/rtw8852b_fw-1.bin failed with error -2
+rtw89_8852be 0000:02:00.0: firmware: direct-loading firmware rtw89/rtw8852b_fw.bin
+rtw89_8852be 0000:02:00.0: loaded firmware rtw89/rtw8852b_fw.bin
+</code>
+But this is a non working fall-back, you can confirm that the WiFi adapter is not working:
+<code>
+ifconfig wlan0 up
+iwlist wlan0 scan
+wlan0     Interface doesn't support scanning : Network is down
+</code>
+You can download the required firmware from the **[[https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/rtw89/rtw8852b_fw-1.bin|kernel Git repository]]** and save it into **/usr/lib/firmware/rtw89/**; there are no directories for locally installed firmwares.
+===== Signal level not reported =====
+If everything is working, you can check for available WiFi networks using **iwlist**:
+<code>
+ifconfig wlan0 up
+iwlist wlan0 scan
+</code>
+The current module (rtw89 1.0.2) does not support the signal level reporting, for every ESSID you see the following:
+<code>
+Quality=70/70  Signal level=0 dBm
 </code>