Date: Sun, 23 Nov 2025 21:51:28 +0000 From: bugzilla-noreply@freebsd.org To: wireless@FreeBSD.org Subject: [Bug 291181] rtw-8821c Wi-Fi: bsdinstall auto-config fails, missing postinstall Message-ID: <bug-291181-21060@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291181 Bug ID: 291181 Summary: rtw-8821c Wi-Fi: bsdinstall auto-config fails, missing postinstall Product: Base System Version: 15.0-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: wireless Assignee: wireless@FreeBSD.org Reporter: fjachuf@gmail.com Created attachment 265607 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=265607&action=edit Explanation of the Wi-Fi issue with rtw-8821c, including screenshots During the installation of FreeBSD 15.0-RC3, I encountered several issues related to Wi-Fi configuration, especially when using DHCP through the installer. 1. Initial Wi-Fi Adapter Configuration. FreeBSD detected my Wi-Fi card as rtw-8821c. First I clicked on automatic network configuration, where I was given the option to add the IPv6 DNS servers. I put in DNS #1 4.2.2.2 and continued, but then when I tried to download the necessary packages to FreeBSD, it said there was no connection. So I decided to go to the Shell station and sure enough there was no connection 2. Shell Test Using DHCP I opened a shell during the installation and ran: dhclient wlan0 With this command, the interface successfully obtained an IP address, and the connection worked. However, once I exited the shell and returned to the installer, the configuration was not preserved, and Wi-Fi disconnected again. 3. Manual Configuration Without DHCP I tried configuring the network again using the manual option (without DHCP), entering the following values: • IP: 192.168.60.216 • Mask: 255.255.255.0 • Router: 192.168.60.1 With this manual configuration, the Wi-Fi connection worked correctly during the installation. The installation completed successfully using the appropriate firmware: wifi-firmware-rtw88-kmod-rtw8821c 4. Post-Installation Behavior After the installation, I only installed the following packages: • gnome • firefox • vim • drm-kmod And I added the following entries to rc.conf: dbus_enable="YES" kld_list="amdgpu" After the first reboot, Wi-Fi stopped working again. However, after rebooting several more times, the Wi-Fi interface started working on its own, without making any additional configuration changes. 5. Wi-Fi Performance Issue Additionally, the Wi-Fi connection does not reach its expected throughput. On other operating systems, this adapter normally achieves 90–130 Mbps, but on FreeBSD I only get around 20 Mbps, even when the signal is strong. This suggests a possible performance or driver-related issue with rtw88. 6. Summary There appear to be reproducible issues with DHCP-based Wi-Fi configuration in the FreeBSD 15.0-RC3 installer (bsdinstall): • DHCP sometimes fails or does not persist the configuration. • Manual network configuration works reliably. • After installation, the Wi-Fi interface may behave inconsistently until it eventually initializes correctly. -- You are receiving this mail because: You are the assignee for the bug.home | help
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