You are not logged in.
Pages: 1
I have an external monitor hooked up to my laptop via HDMI which flickers every few seconds. The screen goes black for about a second or two and then returns. There doesn't seem to be any "weirdness" on the monitor when it is displaying.
I've bought a new HDMI cable thinking this was the issue but it didn't change anything.
I know this is normally a refresh rate issue but I've played with every refresh rate displayed in xrandr and what's more, I have hooked this same monitor to my desktop machine and get no flickering issue with the same 60Hz refresh rate. The monitor says 60HZ when I hit the menu button on the monitor itself.
Any Ideas?
Window Manager: bspwm
Display Manager: N/A
Kernel: 4.7.6-1
Intel Driver: xf86-video-intel 1:2.99.917+708
xrandr
Screen 0: minimum 8 x 8, current 3520 x 1080, maximum 32767 x 32767
eDP1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 290mm x 160mm
1600x900 60.11*+
1368x768 60.00
1280x720 60.00
1024x768 60.00
1024x576 60.00
960x540 60.00
800x600 60.32 56.25
864x486 60.00
800x450 60.00
640x480 59.94
720x405 60.00
640x360 60.00
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1920x1080+1600+0 (normal left inverted right x axis y axis) 480mm x 270mm
1920x1080 60.00*+ 60.00 50.00 59.94
1920x1080i 60.00 50.00 59.94
1680x1050 59.88
1280x1024 75.02 60.02
1440x900 59.90
1280x720 60.00 50.00 59.94
1024x768 75.03 60.00
800x600 75.00 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
Offline
Try removing xf86-video-intel and restart xorg and see if it makes any difference. Also make sure your bios/fw is up-to-date as sometimes newer versions contain fixes for weird problems like that.
That said, I've seen a case where an Intel iGPU had some sort of incompatibility with a VGA projector and couldn't keep a constant signal, this also happened both with windows and linux so it was most probably a hardware incompatibility and not a software problem.
R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K
Offline
Does it remain when you "xrandr --output eDP1 --off"?
Offline
Thanks for the response guys. I have tried removing the Intel drivers and the issue remains. I've just tried turning off eDP1 and it still occurs.
I updated my bios (Its a Samsung Series 9) some years ago when I first bought the machine, and I don't see any new bios options available. I imagine Samsung has moved on.
I'm hoping this isn't a hardware incompatibility issue, I'd prefer to not get another monitor...
Offline
Does it remain for "xrandr --output HDMI1 --mode 1280x720"?
What is a bit odd is the two 60Hz modes for FullHD.
Offline
What is a bit odd is the two 60Hz modes for FullHD.
Not really, one is progressive scan and the other is interlaced.
R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K
Offline
Take a closer look at these lines ;-)
1920x1080 60.00*+ 60.00 50.00 59.94
1920x1080i 60.00 50.00 59.94
Offline
Ahh ok, that. It might still not be strange, it could be due to different supported modes(1) that have a 60Hz refresh rate.
(1) HSYNC/VSYNC polarity, reduced blanking or not, etc.
R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K
Offline
Figurable. And might be cause of flicker.
@woodape, please post the output of "xrandr --verbose -q" (in code tags)
Offline
Hi all, sorry for the late replies, I've been out for the week at a friend's (long) wedding. Here's the output requested:
Screen 0: minimum 8 x 8, current 3520 x 1080, maximum 32767 x 32767
eDP1 connected 1600x900+0+0 (0x49) normal (normal left inverted right x axis y axis) 290mm x 160mm
Identifier: 0x43
Timestamp: 19398
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 0
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
EDID:
00ffffffffffff004ca3463500000000
00150104a51d10780209e59757548a27
22505400000001010101010101010101
010101010101382740c0608420303020
250025a5100000190000000f00000000
000000000028800a1e00000000fe0053
414d53554e470a2020202020000000fe
004c534e3133334b4c3031380a200003
BACKLIGHT: 4647
range: (0, 4648)
Backlight: 4647
range: (0, 4648)
scaling mode: Full aspect
supported: None, Full, Center, Full aspect
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
1600x900 (0x49) 100.400MHz -HSync -VSync *current +preferred
h: width 1600 start 1648 end 1680 total 1792 skew 0 clock 56.03KHz
v: height 900 start 902 end 907 total 932 clock 60.11Hz
1368x768 (0xe7) 85.860MHz -HSync +VSync
h: width 1368 start 1440 end 1584 total 1800 skew 0 clock 47.70KHz
v: height 768 start 769 end 772 total 795 clock 60.00Hz
1280x720 (0xe8) 74.480MHz -HSync +VSync
h: width 1280 start 1336 end 1472 total 1664 skew 0 clock 44.76KHz
v: height 720 start 721 end 724 total 746 clock 60.00Hz
1024x768 (0xe9) 65.000MHz -HSync -VSync
h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.36KHz
v: height 768 start 771 end 777 total 806 clock 60.00Hz
1024x576 (0xea) 46.995MHz -HSync +VSync
h: width 1024 start 1064 end 1168 total 1312 skew 0 clock 35.82KHz
v: height 576 start 577 end 580 total 597 clock 60.00Hz
960x540 (0xeb) 40.784MHz -HSync +VSync
h: width 960 start 992 end 1088 total 1216 skew 0 clock 33.54KHz
v: height 540 start 541 end 544 total 559 clock 60.00Hz
800x600 (0xec) 40.000MHz +HSync +VSync
h: width 800 start 840 end 968 total 1056 skew 0 clock 37.88KHz
v: height 600 start 601 end 605 total 628 clock 60.32Hz
800x600 (0xed) 36.000MHz +HSync +VSync
h: width 800 start 824 end 896 total 1024 skew 0 clock 35.16KHz
v: height 600 start 601 end 603 total 625 clock 56.25Hz
864x486 (0xee) 32.901MHz -HSync +VSync
h: width 864 start 888 end 976 total 1088 skew 0 clock 30.24KHz
v: height 486 start 487 end 490 total 504 clock 60.00Hz
800x450 (0xef) 27.736MHz -HSync +VSync
h: width 800 start 816 end 896 total 992 skew 0 clock 27.96KHz
v: height 450 start 451 end 454 total 466 clock 60.00Hz
640x480 (0xf0) 25.175MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.47KHz
v: height 480 start 490 end 492 total 525 clock 59.94Hz
720x405 (0xf1) 22.176MHz -HSync +VSync
h: width 720 start 728 end 800 total 880 skew 0 clock 25.20KHz
v: height 405 start 406 end 409 total 420 clock 60.00Hz
640x360 (0xf2) 17.187MHz -HSync +VSync
h: width 640 start 640 end 704 total 768 skew 0 clock 22.38KHz
v: height 360 start 361 end 364 total 373 clock 60.00Hz
DP1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x44
Timestamp: 19398
Subpixel: unknown
Clones:
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
HDMI1 connected 1920x1080+1600+0 (0xf3) normal (normal left inverted right x axis y axis) 480mm x 270mm
Identifier: 0x45
Timestamp: 19398
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones: VGA1
CRTC: 1
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
EDID:
00ffffffffffff004e83390800000000
2417010380301b78eafff5a556499d24
165054a54b0081809500b30001010101
010101010101023a801871382d40582c
4500dd0c1100001c000000fd00324c1e
5211000a202020202020000000fc0053
4c454d2d32324d460a202020000000ff
003030303030303030303030303001d8
020321714c048503131412010211101f
16230917078301000067030c00100038
2d011d007251d01e206e2855009fee10
00001f011d00bc52d01e20b82855409f
ee1000001f011d80d0721c1620102c25
809fee1000009e8c0ad090204031200c
4055009fee1000001800000000000000
000000000000000000000000000000fa
aspect ratio: Automatic
supported: Automatic, 4:3, 16:9
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
1920x1080 (0xf3) 148.500MHz -HSync +VSync *current +preferred
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.50KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.00Hz
1920x1080 (0xf4) 148.500MHz +HSync +VSync
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.50KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.00Hz
1920x1080 (0xf5) 148.500MHz +HSync +VSync
h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 56.25KHz
v: height 1080 start 1084 end 1089 total 1125 clock 50.00Hz
1920x1080 (0xf6) 148.352MHz +HSync +VSync
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.43KHz
v: height 1080 start 1084 end 1089 total 1125 clock 59.94Hz
1920x1080i (0xf7) 74.250MHz +HSync +VSync Interlace
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.75KHz
v: height 1080 start 1084 end 1094 total 1125 clock 60.00Hz
1920x1080i (0xf8) 74.250MHz +HSync +VSync Interlace
h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 28.12KHz
v: height 1080 start 1084 end 1094 total 1125 clock 50.00Hz
1920x1080i (0xf9) 74.176MHz +HSync +VSync Interlace
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.72KHz
v: height 1080 start 1084 end 1094 total 1125 clock 59.94Hz
1680x1050 (0xfa) 119.000MHz +HSync -VSync
h: width 1680 start 1728 end 1760 total 1840 skew 0 clock 64.67KHz
v: height 1050 start 1053 end 1059 total 1080 clock 59.88Hz
1280x1024 (0xfb) 135.000MHz +HSync +VSync
h: width 1280 start 1296 end 1440 total 1688 skew 0 clock 79.98KHz
v: height 1024 start 1025 end 1028 total 1066 clock 75.02Hz
1280x1024 (0xfc) 108.000MHz +HSync +VSync
h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 63.98KHz
v: height 1024 start 1025 end 1028 total 1066 clock 60.02Hz
1440x900 (0x4a) 88.750MHz +HSync -VSync
h: width 1440 start 1488 end 1520 total 1600 skew 0 clock 55.47KHz
v: height 900 start 903 end 909 total 926 clock 59.90Hz
1280x720 (0xfd) 74.250MHz +HSync +VSync
h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 45.00KHz
v: height 720 start 725 end 730 total 750 clock 60.00Hz
1280x720 (0xfe) 74.250MHz +HSync +VSync
h: width 1280 start 1720 end 1760 total 1980 skew 0 clock 37.50KHz
v: height 720 start 725 end 730 total 750 clock 50.00Hz
1280x720 (0xff) 74.176MHz +HSync +VSync
h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 44.96KHz
v: height 720 start 725 end 730 total 750 clock 59.94Hz
1024x768 (0x100) 78.750MHz +HSync +VSync
h: width 1024 start 1040 end 1136 total 1312 skew 0 clock 60.02KHz
v: height 768 start 769 end 772 total 800 clock 75.03Hz
1024x768 (0xe9) 65.000MHz -HSync -VSync
h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.36KHz
v: height 768 start 771 end 777 total 806 clock 60.00Hz
800x600 (0x101) 49.500MHz +HSync +VSync
h: width 800 start 816 end 896 total 1056 skew 0 clock 46.88KHz
v: height 600 start 601 end 604 total 625 clock 75.00Hz
800x600 (0xec) 40.000MHz +HSync +VSync
h: width 800 start 840 end 968 total 1056 skew 0 clock 37.88KHz
v: height 600 start 601 end 605 total 628 clock 60.32Hz
720x576 (0x102) 27.000MHz -HSync -VSync
h: width 720 start 732 end 796 total 864 skew 0 clock 31.25KHz
v: height 576 start 581 end 586 total 625 clock 50.00Hz
720x576i (0x103) 13.500MHz -HSync -VSync Interlace
h: width 720 start 732 end 795 total 864 skew 0 clock 15.62KHz
v: height 576 start 580 end 586 total 625 clock 50.00Hz
720x480 (0x104) 27.027MHz -HSync -VSync
h: width 720 start 736 end 798 total 858 skew 0 clock 31.50KHz
v: height 480 start 489 end 495 total 525 clock 60.00Hz
720x480 (0x105) 27.000MHz -HSync -VSync
h: width 720 start 736 end 798 total 858 skew 0 clock 31.47KHz
v: height 480 start 489 end 495 total 525 clock 59.94Hz
640x480 (0x106) 31.500MHz -HSync -VSync
h: width 640 start 656 end 720 total 840 skew 0 clock 37.50KHz
v: height 480 start 481 end 484 total 500 clock 75.00Hz
640x480 (0x107) 25.200MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.50KHz
v: height 480 start 490 end 492 total 525 clock 60.00Hz
640x480 (0xf0) 25.175MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.47KHz
v: height 480 start 490 end 492 total 525 clock 59.94Hz
720x400 (0x108) 28.320MHz -HSync +VSync
h: width 720 start 738 end 846 total 900 skew 0 clock 31.47KHz
v: height 400 start 412 end 414 total 449 clock 70.08Hz
VGA1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x46
Timestamp: 19398
Subpixel: unknown
Clones: HDMI1
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x47
Timestamp: 19398
Subpixel: no subpixels
Clones:
CRTCs: 3
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
I've also run "xrandr --output HDMI1 --mode 1280x720" (after running the above) and have gone some minutes without a flicker. Is the issue the resolution? My desktop uses the full 1920x1080 on the same monitor with no issue.
Offline
We'll see ;-)
Try "xrandr --output HDMI1 --mode 0xf4" resp. "xrandr --output HDMI1 --mode 0xf6"
Those are two "other" FullHD modes, one using a different HSYNC polarity and the other one a slight off frequency.
WARNING: Since this could turn your screen useless, you might want to append "; sleep 10; xrandr --output HDMI1 --auto" to each (which will wait 10 seconds and then revert to the default mode)
If the screen does not turn black or unusable for one of the modes, you might want to continue using it for a longer time to check whether it causes the flicker as well.
Offline
Hi seth, thanks for the help. I've just tried both commands, the "0xf4" flickered almost immediately and the "0xf6" took a couple of minutes but eventually flickered. Going back to the lower res for now. Any other ideas?
Offline
You could try generating new modelines with gtf and/or cvt and see if they differ from what is detected, if they do add them and try using them and see if it works.
You might want to refer to the following wiki page for help https://wiki.archlinux.org/index.php/Xr … leshooting
R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K
Offline
First just try 0xf5 (50Hz) and 0xf7 (interlaced)
HDMI should do 1080p@60, but I don't like™ "Clones: VGA1"
Maybe also record hardware (monitor vendor/model + lspci for the IGP)
Offline
Pages: 1