Asus RT-AC88U (also called AC3100)
Got stuck (boot loop) when I flashed the new stock firmware 24.10.03.
I have tested 4 different routers and have created a logfile for the flashing & booting with serial (ttl).
I will report this bug.
Because the target is bcm53.xx, does this bug occur also on other routers?
What exactly did you flash?
You can always return to OEM fw using OEM tool https://www.asus.com/support/faq/1000814/
Then reset OEM fw to defaults and go through OEM setup without WAN connected (you need to wait for autoconfig timeout)
Then go with normal install procedure here
Of course booting to CFE Recovery Mode is always possible, even after the boot loop…
All version until 24.10.02 are working fine, ’just’ 24.10.03' isn’t working:
Did you flash already the new version?
You should use the OpenWrt firmware selector, to get the newest version 
Model
ASUS RT-AC88U
Platform
bcm53xx/generic
Version
24.10.3 (r28872-daca7c049b)
Did you sysupgrade or flashed via cfe?
I’ve updated a Meraki MX65 to 24.10.3 without issues. The same bcm53xx target but a different cpu.
@brada4 Do you use the rt-ac88u with 24.10.3 , really?
Because I flashed 4 different routers.→ all got stuck, boot loop, I can post the serial logging
I upgraded via sysupgrade and of course also flashed via cfe, couple of time!
Also I did reset the nvram before flashing.
@konus
Thanks for the feedback.
OK interesting, so probably just this device or devices with the Broadcom BCM4709 cpu…
Yiu can barely articulate what you actually did. Why would i ever use broadcom router?
Yes all Asus Router RT-AC88U are affected.
Apparently, also different Asus router like RT-AC68U.
serial console says:
error: Boot program checksum is invalid
The issue has already been reported couple of days ago in github
So please be careful and do NOT upgrade to 24.10.3!
i has same problem with asus ax4200
bootloop,
hi ,
can confirm that system upgrade from CLI to 24.10.3 ended in boot loop.
i used owut to run the update.
owut check --verbose
owut - OpenWrt Upgrade Tool 2025.09.27~f049043e-r1 (/usr/bin/owut)
ASU-Server https://sysupgrade.openwrt.org
Upstream https://downloads.openwrt.org
Target bcm53xx/generic
Profile asus_rt-ac88u
Package-arch arm_cortex-a9
Root-FS-type squashfs
Sys-type trx
Version-from 24.10.1 r28597-0425664679 (kernel 6.6.86)
Version-to 24.10.3 r28872-daca7c049b (kernel 6.6.104)
Build-commit https://git.openwrt.org/?p=openwrt/openwrt.git;a=shortlog;h=daca7c049b
Build-FS-type squashfs
Build-at 2025-09-19T21:19:38Z (~16 days ago)
Image-prefix openwrt-24.10.3-bcm53xx-generic-asus_rt-ac88u
Image-URL https://downloads.openwrt.org/releases/24.10.3/targets/bcm53xx/generic
Image-file openwrt-24.10.3-bcm53xx-generic-asus_rt-ac88u-squashfs.trx
Installed 144 packages
Top-level 73 packages
Default 44 packages
User-installed 40 packages (top-level only)
Package version changes:
base-files 1658~0425664679 1662~daca7c049b
brcmfmac-firmware-4366b1-pcie 20241110-r1 20241110-r2
brcmfmac-firmware-4366c0-pcie 20241110-r1 20241110-r2
brcmfmac-firmware-usb 20241110-r1 20241110-r2
ca-bundle 20241223-r1 20250419-r1
jshn 2024.03.29~eb9bcb64-r1 2025.07.23~49056d17-r1
jsonfilter 2024.01.23~594cfa86-r1 2025.04.18~8a86fb78-r1
kmod-brcmfmac 6.6.86.6.12.6-r1 6.6.104.6.12.44-r2
kmod-brcmutil 6.6.86.6.12.6-r1 6.6.104.6.12.44-r2
kmod-cfg80211 6.6.86.6.12.6-r1 6.6.104.6.12.44-r2
kmod-crypto-acompress 6.6.86-r1 6.6.104-r1
kmod-crypto-crc32c 6.6.86-r1 6.6.104-r1
kmod-crypto-hash 6.6.86-r1 6.6.104-r1
kmod-gpio-button-hotplug 6.6.86-r5 6.6.104-r5
kmod-leds-gpio 6.6.86-r1 6.6.104-r1
kmod-lib-crc-ccitt 6.6.86-r1 6.6.104-r1
kmod-lib-crc32c 6.6.86-r1 6.6.104-r1
kmod-lib-lzo 6.6.86-r1 6.6.104-r1
kmod-nf-conntrack 6.6.86-r1 6.6.104-r1
kmod-nf-conntrack6 6.6.86-r1 6.6.104-r1
kmod-nf-flow 6.6.86-r1 6.6.104-r1
kmod-nf-log 6.6.86-r1 6.6.104-r1
kmod-nf-log6 6.6.86-r1 6.6.104-r1
kmod-nf-nat 6.6.86-r1 6.6.104-r1
kmod-nf-reject 6.6.86-r1 6.6.104-r1
kmod-nf-reject6 6.6.86-r1 6.6.104-r1
kmod-nfnetlink 6.6.86-r1 6.6.104-r1
kmod-nft-core 6.6.86-r1 6.6.104-r1
kmod-nft-fib 6.6.86-r1 6.6.104-r1
kmod-nft-nat 6.6.86-r1 6.6.104-r1
kmod-nft-offload 6.6.86-r1 6.6.104-r1
kmod-nls-base 6.6.86-r1 6.6.104-r1
kmod-phy-bcm-ns-usb2 6.6.86-r1 6.6.104-r1
kmod-phy-bcm-ns-usb3 6.6.86-r1 6.6.104-r1
kmod-ppp 6.6.86-r1 6.6.104-r1
kmod-pppoe 6.6.86-r1 6.6.104-r1
kmod-pppox 6.6.86-r1 6.6.104-r1
kmod-slhc 6.6.86-r1 6.6.104-r1
kmod-usb-bcma 6.6.86-r1 6.6.104-r1
kmod-usb-core 6.6.86-r1 6.6.104-r1
kmod-usb-ehci 6.6.86-r1 6.6.104-r1
kmod-usb-ledtrig-usbport 6.6.86-r1 6.6.104-r1
kmod-usb-ohci 6.6.86-r1 6.6.104-r1
kmod-usb-xhci-hcd 6.6.86-r1 6.6.104-r1
kmod-usb2 6.6.86-r1 6.6.104-r1
kmod-usb3 6.6.86-r1 6.6.104-r1
libblobmsg-json 2024.03.29~eb9bcb64-r1 2025.07.23~49056d17-r1
libjson-script 2024.03.29~eb9bcb64-r1 2025.07.23~49056d17-r1
libmbedtls 3.6.3-r1 3.6.4-r1
libubox 2024.03.29~eb9bcb64-r1 2025.07.23~49056d17-r1
libubus 2025.01.02~afa57cce-r1 2025.07.02~5952b48e-r1
libucode 2025.02.10~a8a11aea-r1 2025.07.18~3f64c808-r1
libudebug 2023.12.06~6d3f51f9 2025.08.24~edeb4d6d
luci 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-app-firewall 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-app-package-manager 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-base 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-light 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-mod-admin-full 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-mod-network 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-mod-status 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-mod-system 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-proto-ipv6 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-proto-ppp 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-ssl 25.103.51521~2ac26e5 25.273.68624~395e73d
luci-theme-bootstrap 25.103.51521~2ac26e5 25.273.68624~395e73d
netifd 2024.12.17~ea01ed41-r1 2025.05.23~7901e66c-r1
rpcd 2024.09.17~9f4b86e7-r1 2025.09.01~bba95191-r1
rpcd-mod-file 2024.09.17~9f4b86e7-r1 2025.09.01~bba95191-r1
rpcd-mod-iwinfo 2024.09.17~9f4b86e7-r1 2025.09.01~bba95191-r1
rpcd-mod-ucode 2024.09.17~9f4b86e7-r1 2025.09.01~bba95191-r1
ubus 2025.01.02~afa57cce-r1 2025.07.02~5952b48e-r1
ubusd 2025.01.02~afa57cce-r1 2025.07.02~5952b48e-r1
ucode 2025.02.10~a8a11aea-r1 2025.07.18~3f64c808-r1
ucode-mod-fs 2025.02.10~a8a11aea-r1 2025.07.18~3f64c808-r1
ucode-mod-math 2025.02.10~a8a11aea-r1 2025.07.18~3f64c808-r1
ucode-mod-nl80211 2025.02.10~a8a11aea-r1 2025.07.18~3f64c808-r1
ucode-mod-rtnl 2025.02.10~a8a11aea-r1 2025.07.18~3f64c808-r1
ucode-mod-ubus 2025.02.10~a8a11aea-r1 2025.07.18~3f64c808-r1
ucode-mod-uci 2025.02.10~a8a11aea-r1 2025.07.18~3f64c808-r1
ucode-mod-uloop 2025.02.10~a8a11aea-r1 2025.07.18~3f64c808-r1
uhttpd 2023.06.25~34a8a74d-r4 2025.07.06~7e64e8ba-r4
uhttpd-mod-ubus 2023.06.25~34a8a74d-r4 2025.07.06~7e64e8ba-r4
wireless-regdb 2025.02.20-r1 2025.07.10-r1
84 packages are out-of-date
Default package analysis:
Default Provided-by
nftables nftables-json
No package build failures found for 24.10.3 arm_cortex-a9.
It is safe to proceed with an upgrade
there was initially and issue with the boot architecture and i had to run this command to be able to apply the image.
uci set system.@system[0].compat_version="2.0"
After reboot the 24.10.3 was in boot loop and i roled back to 24.10.1
Same problem here with a rt-ac66u b2 with ac68u firmware. 24.10.2 runs fine, 24.10.3 breaks
This problem has already been fixed and tested.
the patch “target/linux/bcm53xx/patches-6.6/180-usb-xhci-add-support-for-performing-fake-doorbell.patch” has been updated and committed
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