Bitcoin-qt huge interface size, Linux Mint

[curious droid]

Hello

I have installed Bitcoin Core on Linux Mint 20.1 Ulyssa flowing instructions described in bitcoin.org, then i created desktop icon pointing to bitcoin-qt file from bin.
Bitcoin-qt opens up but the the size of it is very large, cant see bottom portion and it doesn't let me to resize it to fit in the screen, i have no such a problem with any other apps on my system. My display setting seems to be setup correctly, i have 1080p monitor attached, but even on my laptop`s screen withoud second monitor i still have the same problem.
I spent many hours trying to find solution but no luck, there are several articles pointing to some QT version issue but non of them have step by step instruction how to fix the problem, i am very new to Linux. I tried to check my Qt version

Code:

sudo qmake --version

  but i get nothing:

Code:

qmake: could not exec '/usr/lib/qt5/bin/qmake': No such file or directory

I found workaround, opened PDF reader, under "about" it shows: Qt: 5.9.5. It looks like this is a up to date Qt version, so I dont know what to do.
Any idea how to fix the issue?

[1715404214]

1715404214

[NeuroticFish]

Can you please check if it's the same problem as Bitcoin Core 0.21.1 rediculous window width (bug?)
Maybe some of the posts there would be of help too...

[NotATether]

Can you please check if it's the same problem as Bitcoin Core 0.21.1 rediculous window width (bug?)
Maybe some of the posts there would be of help too...

It is exactly the same problem.

I had already filed a Github issue and a fix has been merged into the current branch. It will be present in the next bitcoin core version and also a backport will be made to 0.21.1 if I understand correctly.

[curious droid]

Its similar issue but not exactly, i dont only have large width, it all in general too large and it doesnt have to do with transaction because i am just in process of downloading blokchchain and have no transaction i my wallet.

see screenshot below

[NotATether]

Its similar issue but not exactly, i dont only have large width, it all in general too large and it doesnt have to do with transaction because i am just in process of downloading blokchchain and have no transaction i my wallet.

What's your bitcoin core version?

[curious droid]

Bitcoin Core version v0.21.1

Qt version 5.9.8.

[NotATether]

Bitcoin Core version v0.21.1

Qt version 5.9.8.

This is likely a problem in Bitcoin Core's codebase, not with Qt or your settings.

Was this happening in a previous version of Core as well? Maybe I can run a git bisect and pinpoint the offending commit here too.

[curious droid]

This is my first time running Core on Linux, but i have the same Core version on Win10 with no issue. Regarding git bisect what i should do ?

[NotATether]

This is my first time running Core on Linux, but i have the same Core version on Win10 with no issue. Regarding git bisect what i should do ?

git bisect is a developer tool for detecting regressions inside programs such as Bitcoin Core. I'll take care of running that for you.

I need you to go to https://bitcoincore.org/en/releases/ and download and run version 0.21.0 and see if the issue is still there. If it is, repeat with 0.20.1 and older until you get to the version that doesn't have this blog. Chances are, the bug isn't present in 0.21.0 but you never know.

[curious droid]

In process of doing it.
Can you please tell me if i need to uninstall my current version which already has done more than 60% of IBD and delete all downloaded block chain?

[NotATether]

Can you please tell me if i need to uninstall my current version which already has done more than 60% of IBD and delete all downloaded block chain?

Not necessary. However, you need to pass the -regtest  parameter to the older bitcoin-qt when you start it because this check doesn't require the blockchain downloaded.

Stopping the current version is not required as long as you use -regtest or -testnet. Testnet will download some 30GB of blocks so I recommend  Regtest which will download almost nothing.

[curious droid]

I googled how to run a regtest and did the following:
Downloaded  bitcoin-0.21.0-x86_64-linux-gnu.tar.gz, unzipped it, went to bin folder, opened terminal from there and run

Code:

./bitcoin-qt -regtest

it opened Core welcome screen with this message: Error: Config setting for -rpcport only applied on regtest network when in [regtest] section
But i took a screen shot so you can see that welcome screen size of the version 0.21.0 is same as version 0.21.1 they both are same extra large size around 80% of the screen.

I also run a command /usr/local/bin$ ./test_bitcoin from bin folder of version 0.21.1 and received this error, maybe it has something to do with my initial issue? or i can ignore it

/usr/local/bin$

Code:

./test_bitcoin

Running 445 test cases...
unknown location(0): fatal error: in "streams_tests/streams_buffered_file": memory access violation at address: 0x00000000: no mapping at fault address
test/streams_tests.cpp(205): last checkpoint: "streams_buffered_file" test entry
*** 1 failure is detected in the test module "Bitcoin Core Test Suite"

[HCP]

Which "Edition" of Linux Mint 20.1 are you currently using? Is it the Cinnamon, Mate or Xfce edition?

I'm wondering if it is some weird conflict with the specific desktop environment you are using.

[curious droid]

im using Linux Mint 20.1 Cinnamon

[HCP]

im using Linux Mint 20.1 Cinnamon

Ok... and did you make any changes to the display settings or workspace setup etc? Or is it all running at the "default" values from install? Just asking as I was going to quickly create a VM and see if I can replicate the issue

[curious droid]

I have Samsung TV (1080p) attached as a main screen, so i set it as a main screen, in accessibility i have "large text" ON.
In "font settings" under "text scaling factor" i have 1.2 though when i change this number up or down, everything on screen gets larger or smaller but  Core doesnt get affected at all.

I have this issue with Core only, all other apps are displaying and working normal size.

[HCP]

Unfortunately, I am unable to replicate this with a Mint Cinnamon 20.1 VM... even after changing the display settings etc.

Are you able to manually reduce the window size by dragging the corners/sides of the program windows? If so, are you able to resize it, then shut the application down and restart it... does it automatically blow out the size again? or does it maintain the window geometry?

Given that your other apps are all working OK, I'd say that it could quite likely be an issue with the Bitcoin Core code... apparently there is a -resetguisettings command line option... give that a go and see if it fixes things.

If not, maybe try running an even older version of Bitcoin Core like 0.18 (again with the -regtest) and see if it is broken as well.

[curious droid]

I can resize it just a little but it doesn’t make it useful anyhow.
I run  -resetguisettings in console of Core but looks like there is no such command, i googled about it and found very similar topic to my issue on https://bitcoincore.org/en/releases/0.21.0/
Under issue: gui#102 Fix SplashScreen crash when run with -disablewallet (hebasto)

It takes to this website https://github.com/bitcoin-core/gui/pull/116
Where they refer to another topics with similar issues where it was solved, but it seems there is no clear answer on what to do exactly to fix this bug, im very new to Linux and know only basic codes which i can use only if there are instructions.

[NotATether]

Unfortunately, I am unable to replicate this with a Mint Cinnamon 20.1 VM... even after changing the display settings etc.

Are you able to manually reduce the window size by dragging the corners/sides of the program windows? If so, are you able to resize it, then shut the application down and restart it... does it automatically blow out the size again? or does it maintain the window geometry?

Bingo. Sounds like a DPI problem to me since 0.21.0 also ahs the same bug for OP.

There's an old Github issue about DPI making bitcoin core's window size double as usual and stuff, so maybe Cinamon automatically changed the DPI settings when the smart TV was connected.

It also says running Core like this should fix the problem: export QT_AUTO_SCREEN_SCALE_FACTOR=0 ./bitcoin-qt

But if it doesn't, we'll need information about your displays by running these commands in a terminal:

Code:

xrandr | head -n1
Example output:
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192

xdpyinfo | head -n5
Example output:
name of display:    :0
version number:    11.0
vendor string:    The X.Org Foundation
vendor release number:    12004000
X.Org version: 1.20.4

[curious droid]

Here is the output

Code:

$ xrandr | head -n1

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384

$ xdpyinfo | head -n5

name of display:    :0
version number:    11.0
vendor string:    The X.Org Foundation
vendor release number:    12009000
X.Org version: 1.20.9

I run this code and it fixed the issue

Code:

QT_AUTO_SCREEN_SCALE_FACTOR=0 ./bitcoin-qt

But if i run Core from created icon i still have the issue. Looks like i found a solution to make this permanent fix but since i am not familiar with Linux, dont know how to do it, will you please explain how to do it?

Just modify your menu-entry accordingly or add export QT_AUTO_SCREEN_SCALE_FACTOR=0 to your ~/.profile to have this apply to all Qt apps.

PS: If you need to scale your two screens separately you can do that as well, e.g. QT_SCREEN_SCALE_FACTORS=1;1.5