Created attachment 121755 [details]
dmesg.log saved via the serial port
I'm using a HD 3870 with Debian 9 Stretch x64 (Testing). When booting to a command line, when drivers are loaded, the screen goes into power saving mode, and the system becomes unresponsive.
Booting with `nomodeset' works OK. If I run "#modprobe radeon modeset=1", the screen goes power saving mode, the system stops responding and the caps lock key no longer works (kernel panic?).
I've also tested with a Fedora 23 Workstation Live-CD (64-bit), Ubuntu 15.10 Desktop (64-bit) Live-CD, SystemRescueCd-x86-4.7.0 with the same results (unresponsive on driver load).
I've tested a ATI X1600 Pro in the same system, and everything works fine.
#lspci -nnn | grep VGA
01:00.0 VGA compatible controller : Advanced Micro Devices, Inc. [AMD/ATI] RV670 [Radeon HD 3870] [1002:9501]
Created attachment 121756 [details]
dmesg.log with nomodeset
Created attachment 121757 [details]
Xorg.log with nomodeset
(In reply to Michel Dänzer from comment #3)
> might help.
Sorry for my English. I am newbie. I do not know if I can patch the kernel.
Can you tell me ? This patch is included in the kernel 4.3?
The patch is in kernel 4.4 but not in kernel 4.3.
I tried kernel 4.4 from Sid. All the same. Patch the kernel did not help.
Created attachment 121906 [details]
Kernel 4.4 dmesg.log saved via the serial port
Created attachment 121907 [details]
Kernel 4.4 dmesg.log with nomodeset
Created attachment 121909 [details]
Kernel 4.4 Xorg.log with nomodeset, video HD3870
Created attachment 121910 [details]
Kernel 4.4 Xorg.log, video ATI X1600
Created attachment 121911 [details]
All the same with kernel 4.5.
~$ uname -a
Linux dmytruk1 4.5.0-rc4-amd64 #1 SMP Debian 4.5~rc4-1~exp1 (2016-02-18) x86_64 GNU/Linux