[Bug 200633] New: [Regression] VGA not being detected with R9 380 using AMDGPU after 4.17 kernel update.

[Bug 200633] New: [Regression] VGA not being detected with R9 380 using AMDGPU after 4.17 kernel update.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=200633

            Bug ID: 200633
           Summary: [Regression] VGA not being detected with R9 380 using
                    AMDGPU after 4.17 kernel update.
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.17
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: low
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: syboxez@gmail.com
        Regression: No

OS: Debian Sid
Kernel: 4.17.8
GPU: AMD R9 380
Mesa version: 18.1.4

After upgrading from 4.16 to 4.17 (this bug was also reproduced on 4.18-RC3),
xrandr reports VGA displays (normally DVI-I-1 in my case) as digital displays
(DVI-D-1), and will display a black screen on the monitor I am attempting to
use. In 4.16, it worked perfectly. Booting the system with the 4.16 kernel
resolves the issue.

I will be happy to collect any useful logs upon request, as I'm not too sure
what to look for.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 200633] [Regression] VGA not being detected with R9 380 using AMDGPU after 4.17 kernel update.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=200633

syboxez@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Regression|No                          |Yes

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 200633] [Regression] VGA not being detected with R9 380 using AMDGPU after 4.17 kernel update.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=200633

--- Comment #1 from Michel Dänzer (michel@daenzer.net) ---
Please attach the dmesg output and Xorg log file corresponding to the problem.

amdgpu.dc=0 on the kernel command line might serve as a workaround for the time
being.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 200633] [Regression] VGA not being detected with R9 380 using AMDGPU after 4.17 kernel update.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=200633

--- Comment #2 from syboxez@gmail.com ---
dmesg: https://ghostbin.com/paste/7pyty
Xorg: https://ghostbin.com/paste/38zyy

amdgpu.dc=0 does indeed make the issue go away, so I'm guessing DC was turned
on by default for Tonga in this kernel.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 200633] [Regression] VGA not being detected with R9 380 using AMDGPU after 4.17 kernel update.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=200633

--- Comment #3 from Michel Dänzer (michel@daenzer.net) ---
(In reply to syboxez from comment #2)
> dmesg: https://ghostbin.com/paste/7pyty
> Xorg: https://ghostbin.com/paste/38zyy

Thanks, but please attach files here directly instead of referencing an
external pastebin site.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 200633] [Regression] VGA not being detected with R9 380 using AMDGPU after 4.17 kernel update.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=200633

--- Comment #4 from syboxez@gmail.com ---
Created attachment 277521
  --> https://bugzilla.kernel.org/attachment.cgi?id=277521&action=edit
dmesg log

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 200633] [Regression] VGA not being detected with R9 380 using AMDGPU after 4.17 kernel update.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=200633

--- Comment #5 from syboxez@gmail.com ---
Created attachment 277523
  --> https://bugzilla.kernel.org/attachment.cgi?id=277523&action=edit
Xorg log

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel