[mythtv-users] LG TV starts flickering when using LiveTV

Rajil Saraswat rajil.s at gmail.com
Tue Feb 27 03:11:31 UTC 2018 

Hello,

My LG TV works fine when watching MythVideos or looking at the menus.
However, when using LiveTV goes the TV screen Off/On/Off/On..., it seems
that it does not like the video frequency of the signal.

Any idea what could be the issue?

My X log is as follows:

[  2838.274] (II) NVIDIA(GPU-0): Found DRM driver nvidia-drm (20150116)
[  2838.274] (II) NVIDIA(0): NVIDIA GPU GeForce GT 610 (GF119) at
PCI:1:0:0 (GPU-0)
[  2838.274] (--) NVIDIA(0): Memory: 1048576 kBytes
[  2838.274] (--) NVIDIA(0): VideoBIOS: 75.19.55.00.02
[  2838.274] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[  2838.276] (--) NVIDIA(0): Valid display device(s) on GeForce GT 610
at PCI:1:0:0
[  2838.276] (--) NVIDIA(0):     CRT-0
[  2838.276] (--) NVIDIA(0):     CRT-1
[  2838.276] (--) NVIDIA(0):     DFP-0
[  2838.276] (--) NVIDIA(0):     LG Electronics LG TV (DFP-1) (boot,
connected)
[  2838.276] (--) NVIDIA(GPU-0): CRT-0: 400.0 MHz maximum pixel clock
[  2838.276] (--) NVIDIA(GPU-0): CRT-1: 400.0 MHz maximum pixel clock
[  2838.276] (--) NVIDIA(0): DFP-0: Internal TMDS
[  2838.276] (--) NVIDIA(GPU-0): DFP-0: 330.0 MHz maximum pixel clock
[  2838.276] (--) NVIDIA(0): LG Electronics LG TV (DFP-1): Internal TMDS
[  2838.276] (--) NVIDIA(GPU-0): LG Electronics LG TV (DFP-1): 230.0 MHz
maximum pixel clock
[  2838.276] (**) NVIDIA(0): Using HorizSync/VertRefresh ranges from the
EDID for display
[  2838.276] (**) NVIDIA(0):     device LG Electronics LG TV (DFP-1)
(Using EDID
[  2838.276] (**) NVIDIA(0):     frequencies has been enabled on all
display devices.)
[  2838.276] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.276] (WW) NVIDIA(GPU-0):     mode "1280x720" is specified in the
EDID; however, the
[  2838.276] (WW) NVIDIA(GPU-0):     EDID's valid VertRefresh range
(58.000-62.000 Hz) would
[  2838.276] (WW) NVIDIA(GPU-0):     exclude this mode's VertRefresh
(50.0 Hz); ignoring
[  2838.276] (WW) NVIDIA(GPU-0):     VertRefresh check for mode "1280x720".
[  2838.276] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.276] (WW) NVIDIA(GPU-0):     mode "1920x1080" is specified in
the EDID; however, the
[  2838.276] (WW) NVIDIA(GPU-0):     EDID's valid VertRefresh range
(58.000-62.000 Hz) would
[  2838.276] (WW) NVIDIA(GPU-0):     exclude this mode's VertRefresh
(50.0 Hz); ignoring
[  2838.276] (WW) NVIDIA(GPU-0):     VertRefresh check for mode "1920x1080".
[  2838.276] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.276] (WW) NVIDIA(GPU-0):     mode "1280x720" is specified in the
EDID; however, the
[  2838.276] (WW) NVIDIA(GPU-0):     EDID's valid VertRefresh range
(58.000-62.000 Hz) would
[  2838.276] (WW) NVIDIA(GPU-0):     exclude this mode's VertRefresh
(50.0 Hz); ignoring
[  2838.276] (WW) NVIDIA(GPU-0):     VertRefresh check for mode "1280x720".
[  2838.276] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.276] (WW) NVIDIA(GPU-0):     mode "1920x1080" is specified in
the EDID; however, the
[  2838.276] (WW) NVIDIA(GPU-0):     EDID's valid HorizSync range
(30.000-83.000 kHz) would
[  2838.276] (WW) NVIDIA(GPU-0):     exclude this mode's HorizSync (28.1
kHz); ignoring
[  2838.276] (WW) NVIDIA(GPU-0):     HorizSync check for mode "1920x1080".
[  2838.276] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.276] (WW) NVIDIA(GPU-0):     mode "1920x1080" is specified in
the EDID; however, the
[  2838.276] (WW) NVIDIA(GPU-0):     EDID's valid VertRefresh range
(58.000-62.000 Hz) would
[  2838.276] (WW) NVIDIA(GPU-0):     exclude this mode's VertRefresh
(50.0 Hz); ignoring
[  2838.276] (WW) NVIDIA(GPU-0):     VertRefresh check for mode "1920x1080".
[  2838.276] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.276] (WW) NVIDIA(GPU-0):     mode "720x576" is specified in the
EDID; however, the
[  2838.276] (WW) NVIDIA(GPU-0):     EDID's valid VertRefresh range
(58.000-62.000 Hz) would
[  2838.276] (WW) NVIDIA(GPU-0):     exclude this mode's VertRefresh
(50.0 Hz); ignoring
[  2838.276] (WW) NVIDIA(GPU-0):     VertRefresh check for mode "720x576".
[  2838.276] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.276] (WW) NVIDIA(GPU-0):     mode "1920x1080" is specified in
the EDID; however, the
[  2838.276] (WW) NVIDIA(GPU-0):     EDID's valid HorizSync range
(30.000-83.000 kHz) would
[  2838.276] (WW) NVIDIA(GPU-0):     exclude this mode's HorizSync (27.0
kHz); ignoring
[  2838.276] (WW) NVIDIA(GPU-0):     HorizSync check for mode "1920x1080".
[  2838.276] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.276] (WW) NVIDIA(GPU-0):     mode "1920x1080" is specified in
the EDID; however, the
[  2838.276] (WW) NVIDIA(GPU-0):     EDID's valid VertRefresh range
(58.000-62.000 Hz) would
[  2838.276] (WW) NVIDIA(GPU-0):     exclude this mode's VertRefresh
(24.0 Hz); ignoring
[  2838.276] (WW) NVIDIA(GPU-0):     VertRefresh check for mode "1920x1080".
[  2838.276] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.276] (WW) NVIDIA(GPU-0):     mode "1920x1080" is specified in
the EDID; however, the
[  2838.276] (WW) NVIDIA(GPU-0):     EDID's valid HorizSync range
(30.000-83.000 kHz) would
[  2838.276] (WW) NVIDIA(GPU-0):     exclude this mode's HorizSync (28.1
kHz); ignoring
[  2838.276] (WW) NVIDIA(GPU-0):     HorizSync check for mode "1920x1080".
[  2838.276] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.276] (WW) NVIDIA(GPU-0):     mode "1920x1080" is specified in
the EDID; however, the
[  2838.276] (WW) NVIDIA(GPU-0):     EDID's valid VertRefresh range
(58.000-62.000 Hz) would
[  2838.276] (WW) NVIDIA(GPU-0):     exclude this mode's VertRefresh
(25.0 Hz); ignoring
[  2838.276] (WW) NVIDIA(GPU-0):     VertRefresh check for mode "1920x1080".
[  2838.277] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.277] (WW) NVIDIA(GPU-0):     mode "1920x1080" is specified in
the EDID; however, the
[  2838.277] (WW) NVIDIA(GPU-0):     EDID's valid VertRefresh range
(58.000-62.000 Hz) would
[  2838.277] (WW) NVIDIA(GPU-0):     exclude this mode's VertRefresh
(30.0 Hz); ignoring
[  2838.277] (WW) NVIDIA(GPU-0):     VertRefresh check for mode "1920x1080".
[  2838.277] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.277] (WW) NVIDIA(GPU-0):     mode "720x576" is specified in the
EDID; however, the
[  2838.277] (WW) NVIDIA(GPU-0):     EDID's valid HorizSync range
(30.000-83.000 kHz) would
[  2838.277] (WW) NVIDIA(GPU-0):     exclude this mode's HorizSync (15.6
kHz); ignoring
[  2838.277] (WW) NVIDIA(GPU-0):     HorizSync check for mode "720x576".
[  2838.277] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.277] (WW) NVIDIA(GPU-0):     mode "720x576" is specified in the
EDID; however, the
[  2838.277] (WW) NVIDIA(GPU-0):     EDID's valid VertRefresh range
(58.000-62.000 Hz) would
[  2838.277] (WW) NVIDIA(GPU-0):     exclude this mode's VertRefresh
(50.0 Hz); ignoring
[  2838.277] (WW) NVIDIA(GPU-0):     VertRefresh check for mode "720x576".
[  2838.277] (WW) NVIDIA(GPU-0): The EDID for LG Electronics LG TV
(DFP-1) contradicts itself:
[  2838.277] (WW) NVIDIA(GPU-0):     mode "1152x864" is specified in the
EDID; however, the
[  2838.277] (WW) NVIDIA(GPU-0):     EDID's valid VertRefresh range
(58.000-62.000 Hz) would
[  2838.277] (WW) NVIDIA(GPU-0):     exclude this mode's VertRefresh
(75.0 Hz); ignoring
[  2838.277] (WW) NVIDIA(GPU-0):     VertRefresh check for mode "1152x864".
[  2838.277] (==) NVIDIA(0):
[  2838.277] (==) NVIDIA(0): No modes were requested; the default mode
"nvidia-auto-select"
[  2838.277] (==) NVIDIA(0):     will be used as the requested mode.
[  2838.277] (==) NVIDIA(0):
[  2838.277] (II) NVIDIA(0): Validated MetaModes:
[  2838.277] (II) NVIDIA(0):     "DFP-1:nvidia-auto-select"
[  2838.277] (II) NVIDIA(0): Virtual screen size determined to be 1920 x
1080
[  2838.304] (--) NVIDIA(0): DPI set to (304, 304); computed from
"UseEdidDpi" X config
[  2838.304] (--) NVIDIA(0):     option
[  2838.304] (--) Depth 24 pixmap format is 32 bpp
[  2838.304] (II) NVIDIA: Using 3072.00 MB of virtual memory for
indirect memory
[  2838.304] (II) NVIDIA:     access.
[  2838.307] (II) NVIDIA(0): Setting mode "DFP-1:nvidia-auto-select"
[  2838.362] (==) NVIDIA(0): Disabling shared memory pixmaps
[  2838.362] (==) NVIDIA(0): Backing store disabled
[  2838.362] (==) NVIDIA(0): Silken mouse enabled
[  2838.362] (**) NVIDIA(0): DPMS enabled

Thanks

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