Comment # 34 on bug 1131752 from Stefan Dirsch

Hmm. The logsize is already increased via log_buf_len=1M ...

You can also try with

drm.debug=0x6

(without PRIME and ATOMIC messages)


# modinfo drm
[...]
parm:           debug:Enable debug output, where each bit enables a debug
category.
                Bit 0 (0x01) will enable CORE messages (drm core code)
                Bit 1 (0x02) will enable DRIVER messages (drm controller code)
                Bit 2 (0x04) will enable KMS messages (modesetting code)
                Bit 3 (0x08) will enable PRIME messages (prime code)
                Bit 4 (0x10) will enable ATOMIC messages (atomic code)
                Bit 5 (0x20) will enable VBL messages (vblank code)
                Bit 7 (0x80) will enable LEASE messages (leasing code) (int)