Hello, i have the problem that this GPU is not supported fully. http://www.cpu-world.com/CPUs/Bulldozer/AMD-A8-Series%20A8-9600.html It is not possible to get more display resolution then 1024x768. I discussed the problem already here: https://debianforum.de/forum/viewtopic.php?f=12&t=167981 It seems that AMD is not interested to support the newer GPU's in Linux anymore. The last Crimson / Catalyst only support up to XServer 1.1: http://support.amd.com/en-us/download/desktop?os=Linux%20x86_64#
I'm afraid you got some bad advice there; your GPU is only supported by the amdgpu driver, not by radeon. The best advice you got there was from rendegast, have you tried the kernel and firmware from backports? If the problem persists with those, please provide the full dmesg output and Xorg log file with them. From the Xorg log file there, it looks like the drivers don't get the EDID from the monitor. Since you say it's a "VGA-TFT" monitor, but the drivers only detect a DisplayPort connection, are you using some kind of DisplayPort-to-other converter? Can you try connecting the monitor to an HDMI output instead? Speaking as somebody working for AMD on open source GPU driver support, that's a demonstrably false statement. If you're interested, take a look at articles this year on Phoronix and other sites about our drivers.
Hello Michel, you found the heart of the problem! Am 20.12.2017 um 18:18 schrieb Michel Dänzer: The mainboard supports 3 video outputs: VGA, DVI, HDMI After i connected an additional DVI monitor with Full-HD resolution all was working perfect. I got the 1920 resolution on the DVI and 1024 additional on the VGA monitor. After the DVI Monitor was connected the compositor with OpenGL 2.0 was working too. But it makes problems with only the VGA monitor connected. So a DVI monitor should be used. So this can be classified as minor problem. Hopefully other user will profit from this description. Cheers Karsten
Hello Michel, thank you for your quick reaction. Am 20.12.2017 um 18:18 schrieb Michel Dänzer: O.K. I switched back. I booted again and attached all logs and the output of dmesg. I will test it now. But i have to give up this PC for it. I will report in the next email. I know what you want to say me. But i think it is a good idea that AMD knows that they have to support the Linux user. Of course it is much better when the driver in the distribution will work. But often i get the needed functionality only with the propretary driver. AMD should support a solution that can be integrated into the distributions. Cheers Karsten