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AMD Radeon 6490M

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Hi everyone,

I just installed Debian Buster with KDE Plasma on a notebook that has an
AMD Radeon 6490M and an Intel HD Graphics 3000 installed. The
installation (text-based) worked fine, however, after rebooting, I just
get a tty, X won't start. When checking dmesg for any errors, I found:

[drm:radeon_pci_probe [radeon]] *ERROR* radeon kernel modesetting for R600 or later requires firmware installed

Xorg furthermore listed errors like this:

[    14.666] (II) FBDEV(4): using default device
[    14.682] (II) modeset(G0): using drv /dev/dri/card0
[    14.682] (EE) Screen 0 deleted because of no matching config section.
[    14.682] (II) UnloadModule: "radeon"
[    14.682] (EE) Screen 0 deleted because of no matching config section.
[    14.682] (II) UnloadModule: "modesetting"
[    14.682] (EE) Screen 1 deleted because of no matching config section.
[    14.682] (II) UnloadModule: "fbdev"
[    14.682] (II) UnloadSubModule: "fbdevhw"
[    14.682] (EE) 
Fatal server error:
[    14.683] (EE) Cannot run in framebuffer mode. Please specify busIDs        for all framebuffer devices

So I searched the internet and found several
<https://joshtronic.com/2017/11/06/fixed-radeon-kernel-modesetting-for-r600-or-later-requires-firmware-amd-graphics/>
sources
<http://blog.ataboydesign.com/2017/10/04/error-radeon-kernel-modesetting-for-r600-or-later-requires-firmware-amd-graphics/>
that
<https://superuser.com/questions/1289728/fresh-installed-debian-9-is-bootin-into-black-screen>
recommended installation of

|firmware-amd-graphics|

from non-free. I installed that package, but afterwards the system won't
boot at all - it only displays "loading initial ramdisk" and then the
screen goes black.

Any ideas on how to get graphics output on that machine? I don't even
need the radeon graphics, the integrated Intel graphics would be okay
for a start as well. My full Xorg.0.log <https://termbin.com/x15x> and
my dmesg <https://termbin.com/uc85> are attached here
<https://termbin.com/x15x> and here <https://termbin.com/uc85>.. Thanks
a lot in advance for any ideas!

Kind regards,
LuKaRo

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Thread

AMD Radeon 6490M LuKaRo <lists@lrose.de> - 2021-01-04 03:30 +0100
  Re: AMD Radeon 6490M Felix Miata <mrmazda@earthlink.net> - 2021-01-04 04:30 +0100
    Re: AMD Radeon 6490M Felix Miata <mrmazda@earthlink.net> - 2021-01-04 04:30 +0100
      Re: AMD Radeon 6490M LuKaRo <lists@lrose.de> - 2021-01-04 18:00 +0100
        Re: AMD Radeon 6490M Hans <hans.ullrich@loop.de> - 2021-01-04 18:40 +0100
          Re: AMD Radeon 6490M Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-04 18:50 +0100
            Re: AMD Radeon 6490M Hans <hans.ullrich@loop.de> - 2021-01-04 19:00 +0100
              Re: AMD Radeon 6490M Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-04 20:50 +0100
                Re: AMD Radeon 6490M Felix Miata <mrmazda@earthlink.net> - 2021-01-04 21:10 +0100
                Re: AMD Radeon 6490M LuKaRo <lists@lrose.de> - 2021-01-07 14:10 +0100
    Re: AMD Radeon 6490M Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-04 08:50 +0100
    Re: AMD Radeon 6490M LuKaRo <lists@lrose.de> - 2021-01-04 18:00 +0100
      Re: AMD Radeon 6490M deloptes <deloptes@gmail.com> - 2021-01-04 18:30 +0100
      Re: AMD Radeon 6490M Felix Miata <mrmazda@earthlink.net> - 2021-01-04 21:00 +0100

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