Public bug reported:
Going into fullscreen at low resolutions in SDL apps causes random
flickering green lines across the screen that persist until reboot.
However, the problem does not occur when changing the screen resolution
in the desktop environment's display settings.
Discovered on Ubuntu 19.04, running AMD RX 580 GPU with open-source
amdgpu driver.
Steps to reproduce:
1. Install DOSBox
2. Run DOSBox with default configuration; fullscreen resolution set to
"original" (320x200)
3. Press alt+enter to go into fullscreen mode
4. Press alt+enter again to exit fullscreen.
Bug seems to be unrelated to desktop environment or display manager as
it occurred on Kubuntu 19.04 as well as Xubuntu 19.04. Bug also occurred
when entering low resolution fullscreen in the SDL Doom sourceport
Zandronum. Green flickering persists even after restarting X server.
** Affects: ubuntu
Importance: Undecided
Status: New
** Description changed:
Going into fullscreen at low resolutions in SDL apps causes random
flickering green lines across the screen that persist until reboot.
+ However, the problem does not occur when changing the screen resolution
+ in the desktop environment's display settings.
Discovered on Ubuntu 19.04, running AMD RX 580 GPU with open-source
amdgpu driver.
Steps to reproduce:
1. Install DOSBox
2. Run DOSBox with default configuration; fullscreen resolution set to
"original" (320x200)
3. Press alt+enter to go into fullscreen mode
4. Press alt+enter again to exit fullscreen.
Bug seems to be unrelated to desktop environment or display manager as
- it occurred on Kubuntu 19.04 as well as Xubuntu 19.04. The problem does
- not occur when changing the screen resolution in the desktop
- environment's display settings. Seems to be SDL related; bug also
- occurred when entering low resolution fullscreen in the SDL Doom
- sourceport Zandronum. Green flickering persists even after restarting X
- server.
+ it occurred on Kubuntu 19.04 as well as Xubuntu 19.04. Bug also occurred
+ when entering low resolution fullscreen in the SDL Doom sourceport
+ Zandronum. Green flickering persists even after restarting X server.
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https://bugs.launchpad.net/bugs/1833830
Title:
Display corruption after resolution change in Ubuntu 19.04
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