LMDE6 does not boot with kernel 6 while kernel 5 does

[berni123]

Hi there,

I just upgrades from LMDE5 to LMDE6 and made the mistake of not checking before via booting into a LMDE6-Live from USB.
So after the easy upgrade via mintupgrade from LMDE5 to 6, the system is not booting with kernel 6. After booting
and the first lines from the kernel, the screen turns dark and about 20 seconds later the whole computers resets an boots again.

This is reproducable booting a live system with an LMDE6-USB Stick.

Only kernel 6 is the problem. Booting my upgraded system with the old kernel 5 there is no problem with the boot process.

My hardware (CPU):

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vendor_id	: AuthenticAMD
cpu family	: 21
model		: 19
model name	: AMD A10-6700 APU with Radeon(tm) HD Graphics
stepping	: 1
microcode	: 0x6001119
cpu MHz		: 1801.790
cache size	: 2048 KB
...
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb cpb hw_pstate ssbd vmmcall bmi1 arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold
bugs		: fxsave_leak sysret_ss_attrs null_seg spectre_v1 spectre_v2 spec_store_bypass retbleed
bogomips	: 7385.82
TLB size	: 1536 4K pages
clflush size	: 64
cache_alignment	: 64
address sizes	: 48 bits physical, 48 bits virtual
power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro

Running Kernel: vmlinuz-5.10.0-27-amd64
Failing Kernel: vmlinuz-6.1.0-17-amd64

I already removed the boot option quiet and splash to see as much kernel log on boot time, but there is not much output, so it looks like, that at an very early boot stage there must be the problem.

Any hints from the community? The non-free-firmware package is installed and in the apt-sources-list file included.
Asking google I did not found anything ...

Hope to get a response, any related problems out there?

Bernd

[berni123]

I found a solution but it was related to a very old post:

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GRUB_CMDLINE_LINUX_DEFAULT="radeon.dpm=0"

With this option kernel 6 is booting too.
As we see, for the radeon driver in kernel 5 we do not need to deactivate the dynamic power management,
but again in kernel 6 we have to ...

Well, don't know what an why they change it, but I found the solution finally.



Bernd