Bug#1021904: krdc: Bluescreen when switching to a full screen or rescaling, the only remedy to make it usable again is restarting krdc

[manul <manul91@abv.bg>]

Package: krdc
Version: 4:22.08.1-1
Severity: important

Dear Maintainer,

When connecting to a remote desktop using rdp, initially it connects normally (resolution was set to current screen resolution, initially of course it shows inside decorated window with scrollbars etc.).
But as soon as one attempts to enlarge to "full screen" it loses entirely the remote view leaving a permanent blue screen.
Even further disconnect does not solve the issue (I can't load "new connection" list, other hosts tab, or anything else); the rendering inside the KRDC window seems entirely broken frozen to a blue background.
The only remedy is entirely restarting the krdc app itself.

I tested freerdp2-x11 client alone it works normally on fullscreen etc no issues there.

The above renders krdc unusable unless one sticks to the default "decorated" view which is used immediately after connection. 
Each rescaling/fullscreen leads to a frozen bluescreen background, and the only way to get out of this and have krdc usable again is restarting it.

Tested on two debian sid systems, laptop and desktop.
Same behaviour on both (seems to got triggered by one of the latest versions, maybe released a month or so ago).

Yours,

manul


-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.19.0-2-amd64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages krdc depends on:
ii  libc6                 2.35-3
ii  libkf5bookmarks5      5.98.0-1
ii  libkf5completion5     5.98.0-1
ii  libkf5configcore5     5.98.0-1
ii  libkf5configgui5      5.98.0-1
ii  libkf5configwidgets5  5.98.0-1
ii  libkf5coreaddons5     5.98.0-1
ii  libkf5dnssd5          5.98.0-1
ii  libkf5i18n5           5.98.0-1+b1
ii  libkf5kcmutils5       5.98.0-1
ii  libkf5notifications5  5.98.0-1
ii  libkf5notifyconfig5   5.98.0-1
ii  libkf5wallet-bin      5.98.0-1
ii  libkf5wallet5         5.98.0-1
ii  libkf5widgetsaddons5  5.98.0-1
ii  libkf5windowsystem5   5.98.0-1
ii  libkf5xmlgui5         5.98.0-1+b1
ii  libqt5core5a          5.15.6+dfsg-2
ii  libqt5gui5            5.15.6+dfsg-2
ii  libqt5widgets5        5.15.6+dfsg-2
ii  libqt5xml5            5.15.6+dfsg-2
ii  libssh-4              0.10.4-2
ii  libstdc++6            12.2.0-5
ii  libvncclient1         0.9.13+dfsg-4

Versions of packages krdc recommends:
ii  freerdp2-wayland  2.8.0+dfsg1-1
ii  freerdp2-x11      2.8.0+dfsg1-1

Versions of packages krdc suggests:
ii  khelpcenter  4:22.04.1-1
pn  krfb         <none>

-- no debconf information