| Bug ID | 106427 |
|---|---|
| Summary | RX560, 5k@60Hz, Xorg: Black screen, =E2=80=9Csoft=E2=80= =9D kernel lockup |
| Product | DRI |
| Version | unspecified |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | DRM/AMDgpu |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | txtoxtox285@googlemail.com |
Kernel: 4.16.7 My monitor=E2=80=99s native mode is (some variant of) 5120x2880 at 60Hz. Wh= en amdgpu is loaded during startup, it picks up this mode from the monitor and switches = to it just fine. However, when I start a minimal X (X.Org X server 1.19.5, amdgpu 1.3.0) wit= hout /etc/X11/xorg.conf and just an xterm and no window manager, I can see the f= or a fraction of a second the xterm window in the upper left corner of the screen before the monitor turns black. It=E2=80=99s not turned off, the monitor=E2= =80=99s power LED shows that it=E2=80=99s on. When I try to switch to another Linux console with Alt+Tab+F6, nothing happ= ens; the console is not switched (I can verify this because typing =E2=80=9Cecho= -en '\a'=E2=80=9D doesn=E2=80=99t beep). After ca. 1:30 min the console finally *is* switched but remains black. The kernel spews out messages about timeouts, and I have to reboot the machine (from ssh or Ctrl+Alt+Del). I can use X with 5K if I restrict the refresh rate to 30 Hz (from =E2=80=9C= cvt 5120 2880 30=E2=80=9D). This bug is present since kernel 4.15.10 or thereabouts, which was the first version where amdgpu would work with dc =3D 1.
Created attachment 139402 =
[details]
dmesg-4.16.7
Created attachment 139403 [detai=
ls]
Xorg.log
I would like to mention that =E2=80=9Ccvt 4096 2304 -r=E2=80= =9D is a mode that works under X so it may not be the 60 Hz as such but rather the increased bandwidth, which n= eeds DisplayPort 1.3 instead of just 1.2. (However, when X is terminated the Linux console goes black because it seems that the driver cannot switch back to 5k@60Hz.)
| What | Removed | Added |
|---|---|---|
| Attachment #139403 description | Xorg.log | Xorg.log 5k@60 |
| What | Removed | Added |
|---|---|---|
| Attachment #139402 description | dmesg-4.16.7 | dmesg-4.16.7 5K@60 |
Created attachment 139514=
[details]
dmesg-4.16.7 4K@60
Created attachment 139515=
[details]
Xorg.log 4k@60
Still present with kernel 4.17.0, xorg amdgpu 18.0.1.
Kernel 4.18.1, xorg amdgpu 18.0.1: All quiet on the Western Fr= ont.
I have always wondered why 5k works in the frame buffer but no= t Xorg. 4.19 bring some progress in this regard and made things more consistent: Now the console stays blank too.
Created atta=
chment 142235 [details]
dmesg-4.19.0 with drm.debug=3D0x1ff
| What | Removed | Added |
|---|---|---|
| Resolution | --- | NOTABUG |
| Status | NEW | RESOLVED |