lng@localhost ~ $ cat /var/log/Xorg.0.log | grep '(WW)'
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(WW) NVIDIA(0): Unable to read EDID for display device CRT-0
(WW) NVIDIA(0):
(WW) NVIDIA(0): No modes were requested; the default mode "nvidia-auto-select"
(WW) NVIDIA(0):     will be used as the requested mode.
(WW) NVIDIA(0):
(WW) NVIDIA(0): Unable to get display device CRT-0's EDID; cannot compute DPI
(WW) NVIDIA(0):     from EDID.