chromium fullscreen uses a quarter of a hidpi monitor

[Kidlike]

 * Cinnamon version (cinnamon --version)
> Cinnamon 4.4.5

   - Please specify if you are using the daily builds PPA
> no

 * Distribution - (Mint 17.2, Arch, Fedora 25, etc...)
> Fedora 31

 * Graphics hardware *and* driver used
> Quadro M2200 / NVidia 440.44

 * 32 or 64 bit
> 64bit

 * Attach /home/<username>/.xsession-errors, or /var/log/syslog

Issue When using the full-screen feature of chromium (or any derivative) on a hidpi monitor (3840 x 2160), it takes only the top-left quarter of the monitor (one fourth).

Notes:

• I used a freshly installed chromium without any modifications.
• Firefox behaves properly.
• Chromium on Gnome also behaves properly.

Steps to reproduce

1. Open browser on any website or just empty tab
2. Press F11 to go full-screen

Expected behaviour For chromium to utilize 100% of the monitor.

Other information

Workaround 1

1. Demaximize the window and then press F11

Workaround 2

1. Set the system's UI scaling to "Normal" instead of "Double"

Workaround 3

1. Set cinnamon's panel(s) to "always show"

Workaround 4

1. Open chromium settings
2. Enable Use system title bars and borders
3. Press F11 to go full-screen (it looks broken, worse than before)
4. Press F11 to leave full-screen
5. Disable Use system title bars and borders
6. Press F11 to go full-screen again (this time it works properly, but only once...)

[leigh123linux]

I can't reproduce the issue here with or without hidpi scaling.

https://leigh123linux.fedorapeople.org/pub/video/Cinnamon-Jan-04-2020_11:30:08am.mkv

$ inxi -Fzi
System:
  Host: leigh Kernel: 5.4.5-300.fc31.x86_64 x86_64 bits: 64 
  Desktop: Cinnamon 4.4.6 Distro: Fedora release 31 (Thirty One) 
Machine:
  Type: Desktop System: Gigabyte product: N/A v: N/A serial: <filter> 
  Mobo: Gigabyte model: GA-990X-Gaming SLI-CF v: x.x serial: <filter> 
  BIOS: American Megatrends v: F1 date: 01/28/2016 
CPU:
  Topology: 8-Core model: AMD FX-8350 bits: 64 type: MCP L2 cache: 2048 KiB 
  Speed: 1401 MHz min/max: 1400/4400 MHz Core speeds (MHz): 1: 1401 2: 1405 
  3: 1458 4: 1425 5: 1404 6: 1404 7: 1402 8: 1405 
Graphics:
  Device-1: NVIDIA GP107 [GeForce GTX 1050 Ti] driver: nvidia v: 440.44 
  Display: x11 server: Fedora Project X.org 1.20.6 driver: nvidia 
  unloaded: fbdev,modesetting,nouveau,vesa resolution: 3840x2160~60Hz 
  OpenGL: renderer: GeForce GTX 1050 Ti/PCIe/SSE2 v: 4.6.0 NVIDIA 440.44 
Audio:
  Device-1: AMD SBx00 Azalia driver: snd_hda_intel 
  Device-2: NVIDIA GP107GL High Definition Audio driver: snd_hda_intel 
  Sound Server: ALSA v: k5.4.5-300.fc31.x86_64 
Network:
  Device-1: Intel Wireless 7260 driver: iwlwifi 
  IF: wlp2s0 state: down mac: <filter> 
  Device-2: Realtek RTL8169 PCI Gigabit Ethernet driver: r8169 
  IF: enp5s7 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  Device-3: Intel I211 Gigabit Network driver: igb 
  IF: enp7s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  IP v4: <filter> type: dynamic noprefixroute scope: global 
  IP v6: <filter> type: noprefixroute scope: global 
  IP v6: <filter> type: noprefixroute scope: global 
  IP v6: <filter> type: noprefixroute scope: link 
  IF-ID-1: macvtap0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  WAN IP: <filter> 
Drives:
  Local Storage: total: 3.53 TiB used: 1.45 TiB (41.1%) 
  ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLW256HEHP-00000 
  size: 238.47 GiB 
  ID-2: /dev/sda vendor: Samsung model: SSD 830 Series size: 119.24 GiB 
  ID-3: /dev/sdb vendor: Samsung model: SSD 850 EVO 500GB size: 465.76 GiB 
  ID-4: /dev/sdc vendor: Western Digital model: WD30EZRX-00SPEB0 
  size: 2.73 TiB 
Partition:
  ID-1: / size: 38.32 GiB used: 28.56 GiB (74.5%) fs: ext4 
  dev: /dev/nvme0n1p2 
  ID-2: /home size: 80.61 GiB used: 33.22 GiB (41.2%) fs: ext4 
  dev: /dev/sdb2 
Sensors:
  System Temperatures: cpu: 35.0 C mobo: 32.0 C gpu: nvidia temp: 35 C 
  Fan Speeds (RPM): cpu: 902 fan-2: 931 fan-3: 0 fan-4: 0 fan-5: 0 
  gpu: nvidia fan: 48% 
Info:
  Processes: 281 Uptime: 5d 4h 11m Memory: 31.32 GiB used: 9.18 GiB (29.3%) 
  Shell: bash inxi: 3.0.37 

[Kidlike]

In case this helps:

System:    Host: firefly Kernel: 5.3.16-300.fc31.x86_64 x86_64 bits: 64 Desktop: Cinnamon 4.4.5 
           Distro: Fedora release 31 (Thirty One) 
Machine:   Type: Laptop System: LENOVO product: 20HH001RMZ v: ThinkPad P51 serial: <root required> 
           Mobo: LENOVO model: 20HH001RMZ v: SDK0J40697 WIN serial: <root required> UEFI: LENOVO v: N1UET40W (1.14 ) 
           date: 09/28/2017 
Battery:   ID-1: BAT0 charge: 74.0 Wh condition: 78.3/90.0 Wh (87%) 
CPU:       Topology: Quad Core model: Intel Core i7-7820HQ bits: 64 type: MCP L2 cache: 8192 KiB 
           Speed: 1000 MHz min/max: 800/2900 MHz Core speeds (MHz): 1: 1000 2: 1000 3: 1000 4: 1000 
Graphics:  Device-1: NVIDIA GM206GLM [Quadro M2200 Mobile] driver: nvidia v: 440.44 
           Display: x11 server: Fedora Project X.org 1.20.6 driver: nvidia resolution: 3840x2160~60Hz 
           OpenGL: renderer: Quadro M2200/PCIe/SSE2 v: 4.6.0 NVIDIA 440.44 
Audio:     Device-1: Intel CM238 HD Audio driver: snd_hda_intel 
           Device-2: NVIDIA GM206 High Definition Audio driver: snd_hda_intel 
           Sound Server: ALSA v: k5.3.16-300.fc31.x86_64 
Network:   Device-1: Intel Ethernet I219-LM driver: e1000e 
           IF: enp0s31f6 state: down mac: 54:e1:ad:c4:32:f3 
           Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi 
           IF: wlp4s0 state: up mac: 44:03:2c:7f:a7:47 
           IF-ID-1: virbr0 state: down mac: 52:54:00:7a:0d:b5 
           IF-ID-2: virbr0-nic state: down mac: 52:54:00:7a:0d:b5 
Drives:    Local Storage: total: 476.94 GiB used: 186.75 GiB (39.2%) 
           ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLB512HAJQ-000L7 size: 476.94 GiB 
Partition: ID-1: / size: 48.97 GiB used: 35.54 GiB (72.6%) fs: ext4 dev: /dev/dm-1 
           ID-2: /boot size: 975.9 MiB used: 326.2 MiB (33.4%) fs: ext4 dev: /dev/nvme0n1p2 
           ID-3: /home size: 410.42 GiB used: 150.87 GiB (36.8%) fs: ext4 dev: /dev/dm-3 
           ID-4: swap-1 size: 7.76 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/dm-2 
Sensors:   System Temperatures: cpu: 48.0 C mobo: 44.0 C gpu: nvidia temp: 44 C 
           Fan Speeds (RPM): cpu: 2262 
Info:      Processes: 309 Uptime: 22m Memory: 15.43 GiB used: 2.70 GiB (17.5%) Shell: bash inxi: 3.0.37

[Kidlike]

how can I try cinnamon 4.4.6 ? maybe it's fixed there...

[leigh123linux]

how can I try cinnamon 4.4.6 ? maybe it's fixed there...

I haven't built it for f31 and f30 yet due to bodhi (bodhi is the fedora update system) failure.

muffin build https://koji.fedoraproject.org/koji/buildinfo?buildID=1426186 cinnamon build https://koji.fedoraproject.org/koji/buildinfo?buildID=1426188

[Kidlike]

Is there anything else I could try? or somehow find more info?

[Kidlike]

hm... if I set the system's UI scaling to "Normal" instead of "Double", then full-screen works fine in chromium.

[LinuxOnTheDesktop]

I have had the same problem, in Chrome and Vivaldi, for a couple of weeks. The workaround is to demaximise the window before going full screen. I too find that if I disable HiDPI scaling then the problem goes away. So seemingly this is a HiDPI problem.

OS: Linux Mint 19.3 Tricia x86_64 Host: 20KHCTO1WW ThinkPad X1 Carbon 6th Kernel: 5.3.18-050318-generic Uptime: 2 hours, 54 mins Resolution: 2560x1440 @ 60.01Hz DE: Cinnamon 4.4.6 WM: Mutter (Muffin) GPU: Intel UHD Graphics 620

Chrome: Version 79.0.3945.88 (Official Build) (64-bit)

[Kidlike]

Thank you @LinuxOnTheDesktop that workaround is awesome :)

[LinuxOnTheDesktop]

I think it is the dreaded Grouped Window List (GWL) - which is on the panel by default, perhaps (I'm unsure) - that causes this. I dropped GWL, having tired of its repeated serious bugs, and replaced it with the dock called 'plank'. And now full screen in Chrome works again.

[Kidlike]

I was never using GWL, I always had a custom panel. At least in my case it's not GWL causing this.

But, you pointed in a direction that I found something more... My panel is set to "intelligently hide". If I change it to "always show", then chromium behaves properly.

(added as a workaround to original post)

[LinuxOnTheDesktop]

Ah. Perhaps then more than one thing suffices for the problem, though that seems unlikely. Another alternative is that the problem has something to do with panel or theme.

EDIT: about the auto-hiding - oh. My panel was set to 'autohide' (and I still had the problem). Relatedly: Plank has autohide and 'intelligently hide' options (amongst others) - and using either of those options, Chrome fullscreens correctly.

[LinuxOnTheDesktop]

I have not experienced this problem for a long time. Yesterday I created a bottom panel (I did not have one before) with its hiding set to 'auto hide'. Then the problem started again, immediately. The problem persists if I set the panel to 'hide intelligently'. Once I set the panel to always show, then the problem is gone.

Inference: this problem is caused by the conjunction of HiDPI and a panel set to hide. It is a shame because, just as I had found Grouped Window List to have become usable, I am going to have to go back to using the dock called Plank - in order to avoid this problem.