bitcoin-qt 20. GUI opens empty about gui

[hebasto]

Will try to reproduce.

[hebasto]

Ubuntu Eoan 19.10, minimal installation, full update, Bitcoin Core 0.20.0 binary from bitcoincore.org:

[hebasto]

@NinjaTurtle007
To dissect this issue also log file could be helpful.

---

Also could you create a temporary data directory, say "/home/${USERNAME}/tempdatadir", and run:

$ bitcoin-qt -datadir=/home/${USERNAME}/tempdatadir

?

---

Another suggestion is to run the same Ubuntu version from live-USB/CD on the same hardware, download and launch bitcoin-qt in that environment.

[hebasto]

@NinjaTurtle007

Mind testing the latest v0.20.1?

[NinjaTurtle007]

No luck with 0.20.1 either, here is the relevant GUI part from debug.log in the new data dir

2020-08-10T17:01:25Z Bitcoin Core version v0.20.1 (release build)
2020-08-10T17:01:25Z Qt 5.9.8 (static), plugin=xcb (static)
2020-08-10T17:01:25Z System: Pop!_OS 20.04 LTS, x86_64-little_endian-lp64
2020-08-10T17:01:25Z Screen: DP-1.3 4x1, pixel ratio=1355.0
2020-08-10T17:01:25Z Screen: DP-1.1 3440x1440, pixel ratio=1.0
2020-08-10T17:01:25Z Screen: eDP-1-1 1920x1080, pixel ratio=1.0
2020-08-10T17:01:25Z GUI: QPainter::begin: Paint device returned engine == 0, type: 2
2020-08-10T17:01:25Z GUI: QPainter::setPen: Painter not active
2020-08-10T17:01:25Z GUI: QPainter::setFont: Painter not active
2020-08-10T17:01:25Z GUI: QPainter::fontMetrics: Painter not active
2020-08-10T17:01:45Z GUI: QPainter::setFont: Painter not active
2020-08-10T17:01:45Z GUI: QPainter::fontMetrics: Painter not active
2020-08-10T17:01:45Z GUI: QPainter::setFont: Painter not active
2020-08-10T17:01:45Z GUI: QPainter::fontMetrics: Painter not active
2020-08-10T17:01:45Z GUI: QPainter::setFont: Painter not active
2020-08-10T17:01:45Z GUI: QPainter::end: Painter not active, aborted
2020-08-10T17:01:52Z Assuming ancestors of block 0000000000000000000f2adce67e49b0b6bdeb9de8b7c3d7e93b21e7fc1e819d have valid signatures.

[hebasto]

This part

2020-08-10T17:01:25Z Screen: DP-1.3 4x1, pixel ratio=1355.0

looks very strange for me...

[NinjaTurtle007]

Indeed, this is infact 5120x1440 super ultrawide monitor which has the same scaling like the others (100% so no scaling actually). No idea why it shows it like that in the log.

[hebasto]

What are outputs of xdpyinfo | grep -B 2 resolution and xrandr?

[NinjaTurtle007]

xdpyinfo | grep -B 2 resolution
screen #0:
dimensions: 7040x2880 pixels (1863x762 millimeters)
resolution: 96x96 dots per inch

xrandr
Screen 0: minimum 8 x 8, current 7040 x 2880, maximum 32767 x 32767
DP-1.1 connected 3440x1440+956+0 (normal left inverted right x axis y axis) 800mm x 335mm
3440x1440 59.97*+ 49.99 29.99
2560x1080 60.00 59.94 50.00
1920x1080 60.00 59.94 50.00
1680x1050 59.95
1600x900 60.00
1280x1024 60.02
1280x800 59.81
1280x720 60.00 59.94 50.00
1152x864 60.00
1024x768 60.00
800x600 60.32
720x576 50.00
720x480 59.94
640x480 59.94 59.93
DP-1.3 connected primary 5120x1440+0+1440 (normal left inverted right x axis y axis) 1mm x 1mm
3840x1080 119.97 + 99.96 59.97
5120x1440 119.97 100.00 59.98*
2560x1440 59.95
2560x1080 119.88 100.00 60.00 59.94
1920x1080 119.88 100.00 60.00 59.94
1680x1050 59.95
1600x900 60.00
1440x900 59.89
1280x1024 75.02 60.02
1280x800 59.81
1280x720 60.00
1152x864 75.00
1024x768 75.03 70.07 60.00
800x600 75.00 72.19 60.32 56.25
640x480 75.00 72.81 59.94
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
eDP-1-1 connected 1920x1080+5120+1440 (normal left inverted right x axis y axis) 344mm x 193mm
3840x2160 60.00 + 59.98 59.97
3200x1800 59.96 59.94
2880x1620 59.96 59.97
2560x1600 59.99 59.97
2560x1440 59.99 59.99 59.96 59.95
2048x1536 60.00
1920x1440 60.00
1856x1392 60.01
1792x1344 60.01
2048x1152 59.99 59.98 59.90 59.91
1920x1200 59.88 59.95
1920x1080 60.01 59.97 59.96 59.93*
1600x1200 60.00
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1440x900 59.89
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1360x768 59.80 59.96
1280x800 59.99 59.97 59.81 59.91
1152x864 60.00
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
800x512 60.17
700x525 59.98
800x450 59.95 59.82
640x512 60.02
720x450 59.89
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
680x384 59.80 59.96
640x400 59.88 59.98
576x432 60.06
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
2560x1440 (0x1dc) 241.500MHz +HSync -VSync
h: width 2560 start 2608 end 2640 total 2720 skew 0 clock 88.79KHz
v: height 1440 start 1443 end 1448 total 1481 clock 59.95Hz
1680x1050 (0x1c7) 146.250MHz -HSync +VSync
h: width 1680 start 1784 end 1960 total 2240 skew 0 clock 65.29KHz
v: height 1050 start 1053 end 1059 total 1089 clock 59.95Hz
1280x1024 (0x1c9) 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 (0x1e2) 106.500MHz -HSync +VSync
h: width 1440 start 1520 end 1672 total 1904 skew 0 clock 55.93KHz
v: height 900 start 903 end 909 total 934 clock 59.89Hz
1280x800 (0x1ca) 83.500MHz -HSync +VSync
h: width 1280 start 1352 end 1480 total 1680 skew 0 clock 49.70KHz
v: height 800 start 803 end 809 total 831 clock 59.81Hz
1152x864 (0x1ce) 81.620MHz -HSync +VSync
h: width 1152 start 1216 end 1336 total 1520 skew 0 clock 53.70KHz
v: height 864 start 865 end 868 total 895 clock 60.00Hz
1024x768 (0x1cf) 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 (0x1d0) 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 (0x1e9) 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
640x480 (0x1d3) 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

[hebasto]

Indeed, this is infact 5120x1440 super ultrawide monitor which has the same scaling like the others (100% so no scaling actually). No idea why it shows it like that in the log.

Could you try to disconnect this device, reboot OS, and test bitcoin-qt?

[hebasto]

FWIW, tested latest v0.20.1 on just installed Pop!_OS 20.04 LTS. It works flawlessly for me :)

[NinjaTurtle007]

Yup, works perfect without that monitor even without restart. Thanks for narrowing it down to the monitor, great work! :)
Now if I can only make it work with that montior as well, since it's my main one would be awesome!

btw, bitcoin 0.18 still works perfect on that same setup.

[hebasto]

btw, bitcoin 0.18 still works perfect on that same setup.

Not sure if it is the reason, but 0.18 uses Qt 5.9.7, and 0.19+ uses Qt 5.9.8. Have you done OS upgrade?

Couldn't say more being not able to reproduce the issue locally :)

btw, you could try to overwrite EDID info for your monitor

[NinjaTurtle007]

I did upgrade the OS but just today, from 19.10 to 20.04 and it was the same issue on 19.10 as well.

How do I overwrite EDID and could that mess up my current multi-monitor setup? Took a while to make it work via a dock :)

[shaun-ba]

Also having this issue on a Samsung superwide monitor and 20.04, bitcoin-qt runs and syncs watching debug logs but no GUI at all, I can't do anything therefore.