** Description changed:

  When I play a video with mpv (or e.g. Firefox), it works just fine.
  
  When this video is fullscreened (e.g. in mpv by pressing f), the screen
  quickly turns off, and switches resolution modes in such a rate the
  screen is unusable.
  
  The native resolution of the screen is 1440p, but Xorg somehow increases
  the size to 3424x1926 for the fullscreen, then quickly switches back to
  1440p, before increasing it again.
  
  As soon as the video is de-fullscreened (by pressing f again in mpv, or
  esc in Firefox), the funny resolution switching stops and the system is
  usable again.
  
- 
- This also happens with the modesetting 2d-driver. This does not happen with 
Wayland.
- 
+ This also happens with the modesetting 2d-driver. This does not happen
+ with Wayland.
  
  This can be seen in the Xorg-log:
  [    20.215] (II) intel(0): EDID vendor "JDI", prod id 0
  [    20.215] (II) intel(0): Printing DDC gathered Modelines:
  [    20.215] (II) intel(0): Modeline "2560x1440"x0.0  245.12  2560 2608 2640 
2720  1440 1443 1449 1502 +hsync -vsync (90.1 kHz eP)
  [   258.869] (II) intel(0): resizing framebuffer to 3424x1926
  [   258.905] (II) intel(0): switch to mode [email protected] on eDP1 using pipe 
0, position (0, 0), rotation normal, reflection none
  [   268.955] (II) intel(0): resizing framebuffer to 2560x1440
  [   269.097] (II) intel(0): switch to mode [email protected] on eDP1 using pipe 
0, position (0, 0), rotation normal, reflection none
  [   270.383] (II) intel(0): resizing framebuffer to 3424x1926
  [   270.400] (II) intel(0): switch to mode [email protected] on eDP1 using pipe 
0, position (0, 0), rotation normal, reflection none
  [   271.852] (II) intel(0): resizing framebuffer to 2560x1440
  [   271.858] (II) intel(0): switch to mode [email protected] on eDP1 using pipe 
0, position (0, 0), rotation normal, reflection none
  [   273.294] (II) intel(0): resizing framebuffer to 3424x1926
  [   273.314] (II) intel(0): switch to mode [email protected] on eDP1 using pipe 
0, position (0, 0), rotation normal, reflection none
  
+ When the resolution is increased, the Kernel complains about the
+ framebuffer size:
+ 
+ [  269.830034] [drm] Reducing the compressed framebuffer size. This may
+ lead to less power savings than a non-reduced-size. Try to increase
+ stolen memory size if available in BIOS.
+ 
+ 
+ 
  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu13
  ProcVersionSignature: Ubuntu 5.4.0-12.15-generic 5.4.8
  Uname: Linux 5.4.0-12-generic x86_64
  ApportVersion: 2.20.11-0ubuntu16
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Feb  6 00:00:07 2020
  DistUpgraded: 2020-02-05 22:21:13,002 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
  DistroCodename: focal
  DistroVariant: ubuntu
  DpkgLog:
-  
+ 
  ExtraDebuggingInterest: Yes
  GraphicsCard:
-  Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA 
controller])
-    Subsystem: Lenovo UHD Graphics 620 [17aa:2259]
+  Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA 
controller])
+    Subsystem: Lenovo UHD Graphics 620 [17aa:2259]
  MachineType: LENOVO 20LES01W00
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-12-generic 
root=/dev/mapper/hostname-ubunturoot ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: Upgraded to focal on 2020-02-05 (0 days ago)
  dmi.bios.date: 11/27/2019
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N25ET52W (1.38 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20LES01W00
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 31
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrN25ET52W(1.38):bd11/27/2019:svnLENOVO:pn20LES01W00:pvrThinkPadX1Yoga3rd:rvnLENOVO:rn20LES01W00:rvrNotDefined:cvnLENOVO:ct31:cvrNone:
  dmi.product.family: ThinkPad X1 Yoga 3rd
  dmi.product.name: 20LES01W00
  dmi.product.sku: LENOVO_MT_20LE_BU_Think_FM_ThinkPad X1 Yoga 3rd
  dmi.product.version: ThinkPad X1 Yoga 3rd
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.100-4
  version.libgl1-mesa-dri: libgl1-mesa-dri 19.3.3-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20190815-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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https://bugs.launchpad.net/bugs/1862081

Title:
  xorg resizes framebuffer when playing fullscreen video over and over
  again

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