https://bugs.freedesktop.org/show_bug.cgi?id=108577
--- Comment #34 from Duncan Roe <duncan_...@optusnet.com.au> ---
(In reply to Alex Deucher from comment #33)
> Does this patch fix the issue with fbc enabled?
> https://patchwork.freedesktop.org/patch/264806/
No. I get the black screen after entering *startx* (system boots to
command-line prompt).
However, I let the screen time out for a long time while I went checking for
stuff. When I went to Ctrl-Alt-F1 to get back to command mode, a proper X
display appeared.
I rebooted (Had to power off owing to Bug 108464). This time I tried touching
keys as soon as I noticed X had timed out but nothing would wake it up (like
the "oddity" mentioned in Comment 32).
Trying again, last time for tonight. Have taken the precaution of starting an
xterm using my desktop's DISPLAY before starting X. Am following /var/log/debug
(set up to log everything).
Nov 30 22:09:46 smallstar kernel: [ 697.279929] [drm:dc_commit_state
[amdgpu]] dc_commit_state: 0 streams
Nov 30 22:09:46 smallstar kernel: [ 697.280185]
[drm:hwss_edp_backlight_control [amdgpu]] hwss_edp_backlight_control: backlight
action: Off
Nov 30 22:09:46 smallstar kernel: [ 697.312816] [drm:generic_reg_wait
[amdgpu]] REG_WAIT taking a while: 5ms in dce110_stream_encoder_dp_blank
line:922
Nov 30 22:09:46 smallstar kernel: [ 697.313269]
[drm:hwss_edp_power_control [amdgpu]] hwss_edp_power_control: Panel Power
action: Off
Nov 30 22:09:46 smallstar kernel: [ 697.329572] [drm:drm_mode_setcrtc
[drm]] [CRTC:40:crtc-0]
Nov 30 22:09:46 smallstar kernel: [ 697.329617] [drm:drm_mode_setcrtc
[drm]] [CRTC:42:crtc-1]
Nov 30 22:09:46 smallstar kernel: [ 697.329667] [drm:drm_mode_setcrtc
[drm]] [CRTC:40:crtc-0]
Touch the Ctrl key at 22:15:08 (I was called away) and X display shows:
Nov 30 22:15:08 smallstar kernel: [ 1019.371568] [drm:drm_mode_setcrtc
[drm]] [CRTC:40:crtc-0]
Nov 30 22:15:08 smallstar kernel: [ 1019.371601] [drm:drm_mode_setcrtc
[drm]] [CONNECTOR:44:eDP-1]
Nov 30 22:15:08 smallstar kernel: [ 1019.378652] [drm:dc_commit_state
[amdgpu]] dc_commit_state: 1 streams
Nov 30 22:15:08 smallstar kernel: [ 1019.378727] [drm:dc_stream_log
[amdgpu]] core_stream 0x00000000f8a1cb08: src: 0, 0, 1366, 768; dst: 0, 0,
1366, 768, colorSpace:1
Nov 30 22:15:08 smallstar kernel: [ 1019.378797] [drm:dc_stream_log
[amdgpu]] ^Ipix_clk_khz: 76300, h_total: 1558, v_total: 816, pixelencoder:1,
displaycolorDepth:1
Nov 30 22:15:08 smallstar kernel: [ 1019.378867] [drm:dc_stream_log
[amdgpu]] ^Isink name: , serial: 0
Nov 30 22:15:08 smallstar kernel: [ 1019.378938] [drm:dc_commit_state
[amdgpu]] ^Ilink: 0
Nov 30 22:15:08 smallstar kernel: [ 1019.379244]
[drm:dce110_compressor_disable_fbc [amdgpu]] FBC status changed to 0
Nov 30 22:15:08 smallstar kernel: [ 1019.379501]
[drm:hwss_edp_power_control [amdgpu]] hwss_edp_power_control: Panel Power
action: On
Nov 30 22:15:08 smallstar kernel: [ 1019.500815] [drm:enable_link_dp
[amdgpu]] Link: 0 eDP panel mode supported: 1 eDP panel mode enabled: 1
Nov 30 22:15:08 smallstar kernel: [ 1019.503669]
[drm:dc_link_dp_perform_link_training [amdgpu]] HBRx1 pass VS=0, PE=0
Nov 30 22:15:08 smallstar kernel: [ 1019.504331]
[drm:hwss_edp_backlight_control [amdgpu]] hwss_edp_backlight_control: backlight
action: On
Nov 30 22:15:08 smallstar kernel: [ 1019.516877] [drm:dc_commit_state
[amdgpu]] {1366x768, 1558x816@76300Khz}
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