Bug 90889

Summary: Radeon driver with radeon.dpm=1 causes lockout
Product: DRI Reporter: lolwoot1234
Component: DRM/RadeonAssignee: Default DRI bug account <dri-devel>
Status: NEW --- QA Contact:
Severity: major    
Priority: medium    
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
i915 platform: i915 features:

Description lolwoot1234 2015-06-07 22:37:21 UTC
Radeon driver cases lockout when trying to boot with radeon.dpm=1 with certain cards. Seems like dynamic power management causes the issue and radeon.dpm=0 fixes it.

Additional info:
* HD 6950, 7570M and HD6870 tested

Steps to reproduce:
* radeon.dpm=1
Comment 1 Michel Dänzer 2015-06-08 01:21:11 UTC
What exactly does "lockout" mean? What are the symptoms?

Please attach the corresponding dmesg output and/or the kernel .config file. Is all the required microcode installed correctly? (It needs to be in the initrd as well if the driver is loaded from there)
Comment 2 lolwoot1234 2015-06-09 15:06:50 UTC
Lockout as in no systemd services working, can't ssh into it or switch tty/vt and getting a blank screen. 

Here is the systemd journal log when booting with the default radeon.dpm=1: http://pastebin.com/raw.php?i=SRpX7QLK

If by microcode you mean the early KMS/initramfs, yes, it is installed correctly and works with radeon.dpm=0.
Comment 3 lolwoot1234 2015-09-03 23:35:15 UTC
Issue still not fixed...
Early KMS doesn't really change anything

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