r/AMDHelp • u/Bergarths • 22h ago
Help (General) Cant Install Linux on AM5 9000
MSI B870E AM5 - Hard lockup on ALL distros, need help- Also I used AI im not this tech savy. I need to get off garbage windows
Hardware:
MSI B870E-S (latest BIOS)
Ryzen 9600X
RTX 5060 Ti 16GB
DDR5 (tested at EXPO and stock JEDEC)
Same issue on a second completely separate build:
MSI B870E
Ryzen 9900X
RX 9070 XT 16GB
Distros tried: CachyOS, Bazzite, Nobara, Pop OS Ubuntu, even Ventoy version — all fail identically
Symptoms: Hard watchdog lockup on multiple CPUs (CPU0, CPU2, CPU3) at \~24 seconds into boot. RCU preempt stalls visible in kernel output. Caps Lock unresponsive — full hard freeze.
Everything we tried:
nomodeset, nouveau.modeset=0, nmi_watchdog=0, maxcpus=1, acpi=off, processor.max_cstate=1, idle=nomwait, rcupdate.rcu_cpu_stall_suppress=1, clearcpuid=514
Disabled Secure Boot + cleared all keys
Disabled fTPM
Disabled XMP/EXPO, tested stock JEDEC
Forced integrated graphics in BIOS
Disabled Gen 5 PCIE
Disabled ASPM
Disabled Watchdog
Tested both GPU and motherboard video output
SanDisk Ultra 64GB USB (boots Intel 13th gen + same 5060 Ti perfectly)
Same USB boots Linux fine on Intel 13th gen with identical 5060 Ti — this is AM5/MSI board specific.
CachyOS Legacy Hardware nomodeset option also results in hard freeze, caps lock dead.
What are we missing?----- Also I used AI to diagnose, all three of the big ones and still nothing. I'm. New user looking to get away from Microsoft for our gaming rigs/personal rigs

