Virtualbox manager window. Unable to resize.

Hello!
Unable to resize virtualbox manager window immediately after launch.
There are no such problems with other Qt applications.
What can you advise?

https://drive.google.com/file/d/1gH-LVgvkz8sbFhUJUB-TupnSpywdje4q/view?usp=sharing

[alexander@alex-npc ~]$ inxi -Fxz
System:    Host: alex-npc Kernel: 5.4.15-2-MANJARO x86_64 bits: 64 compiler: gcc v: 9.2.0 Desktop: KDE Plasma 5.17.5 
           Distro: Manjaro Linux 
Machine:   Type: Laptop System: LENOVO product: IdeaPad Z580 v: Lenovo Z580 serial: <filter> 
           Mobo: LENOVO model: Lenovo v: Lenovo Z580 serial: <filter> UEFI: LENOVO v: 5FCN35WW date: 08/03/2012 
Battery:   ID-1: BAT1 charge: 25.5 Wh condition: 43.4/46.2 Wh (94%) model: SMP LNV-L11M6Y01 status: Charging 
CPU:       Topology: Dual Core model: Intel Core i5-3210M bits: 64 type: MT MCP arch: Ivy Bridge rev: 9 
           L2 cache: 3072 KiB 
           flags: avx lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 19962 
           Speed: 1198 MHz min/max: 1200/3100 MHz Core speeds (MHz): 1: 1198 2: 1198 3: 1197 4: 1197 
Graphics:  Device-1: Intel 3rd Gen Core processor Graphics vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0 
           Device-2: NVIDIA GK107M [GeForce GT 640M] driver: N/A bus ID: 01:00.0 
           Display: x11 server: X.Org 1.20.7 driver: intel resolution: 1366x768~60Hz 
           OpenGL: renderer: Mesa DRI Intel Ivybridge Mobile v: 4.2 Mesa 19.3.2 direct render: Yes 
Audio:     Device-1: Intel 7 Series/C216 Family High Definition Audio vendor: Lenovo driver: snd_hda_intel v: kernel 
           bus ID: 00:1b.0 
           Sound Server: ALSA v: k5.4.15-2-MANJARO 
Network:   Device-1: Realtek RTL810xE PCI Express Fast Ethernet vendor: Lenovo driver: r8169 v: kernel port: 2000 
           bus ID: 03:00.0 
           IF: enp3s0 state: down mac: <filter> 
           Device-2: Intel Wireless 7260 driver: iwlwifi v: kernel port: 2000 bus ID: 04:00.0 
           IF: wlp4s0 state: up mac: <filter> 
Drives:    Local Storage: total: 1.13 TiB used: 58.92 GiB (5.1%) 
           ID-1: /dev/sda vendor: Crucial model: CT240BX500SSD1 size: 223.57 GiB 
           ID-2: /dev/sdb vendor: Seagate model: ST1000LM024 HN-M101MBB size: 931.51 GiB 
Partition: ID-1: / size: 91.17 GiB used: 11.29 GiB (12.4%) fs: ext4 dev: /dev/sdb2 
           ID-2: /home size: 824.10 GiB used: 47.63 GiB (5.8%) fs: ext4 dev: /dev/sdb3 
Sensors:   System Temperatures: cpu: 53.0 C mobo: N/A 
           Fan Speeds (RPM): N/A 
Info:      Processes: 201 Uptime: 9h 08m Memory: 5.67 GiB used: 1.35 GiB (23.8%) Init: systemd Compilers: gcc: 9.2.0 
           Shell: bash v: 5.0.11 inxi: 3.0.37

Welcome to Manjaro.

Same here but I never noticed until I saw your post. The window is resizable after some time..
Don't know if anything can be done about it, for now I'm writing it off as an upstream (Oracle/VirtualBox) problem.

Please search the forum before posting - Many issues has been covered already.

Including VirtualBox

Just after an unsuccessful search, I created this topic.
The link you provided does not describe and solve my problem.

No it does not - but it provides several trouble shooting tips and links to the current problems with VirtualBox and graphics.

It is also mention that resizing a VM does not occur immediate - but after a few seconds.

Sure, but OP is not talking about VM windows and their sizing but of the main application window (Oracle VirtualBox Manager). No VM is involved/started - it's a "simple" window.

:bulb: - oh - that went over my head - I am so used to it being the VM window which is not seamless. And I don't watch random videos on youtube - google drive or anywhere.

I think that is local problem - I have never seen it and connect reproduce.

Change Qt theming properties and/or theme using

qt5ct

and

kvantummanager

I use KDE, and that is probably why I don’t have the applications you specified.

That is strange - not you don't kave the apps - but that you cannot resize the window.

I have a system running kde-dev - just installed VB - and I am not able to replicate the issue.

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