Laptop screen blank after unplugged external monitor

Hi !
I have asus tuf fx705dt laptop. I has amd and nvidia video.
When I installed ubuntu, external monitor (hdmi) doesnt work.
I did this steps and it fixed:

But now, after some updates i think. When I unplugged my external monitor and move to some other place, when I open screen I saw:
nvidiea-modeset: ERROR: GPU:0: Idling display engine timed out: 0x000c57d:0:0:291

And if I reboot , laptop screen is in blank. To fix I need to turn on when display connected to hdmi and then unplug without locking screen/close laptop.

I attached debug when screen is in blank (but CTRL+ALT+Fx works)
nvidia-bug-report.log.gz (279.3 KB)

Now I use Ubuntu 20.04 with plasma/kde and sddm.

Best Regards !

More info:

inxi -Fxzd

System:    Kernel: 5.4.0-42-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: KDE Plasma 5.18.5 
           Distro: Ubuntu 20.04.1 LTS (Focal Fossa) 
Machine:   Type: Laptop System: ASUSTeK product: TUF Gaming FX705DT_FX705DT v: 1.0 serial: <filter> 
           Mobo: ASUSTeK model: FX705DT v: 1.0 serial: <filter> UEFI: American Megatrends v: FX705DT.308 date: 09/19/2019 
Battery:   ID-1: BAT0 charge: 10.9 Wh condition: 56.3/64.1 Wh (88%) model: FX70542 status: Discharging 
           Device-1: hidpp_battery_0 model: Logitech Wireless Mouse charge: 55% (should be ignored) status: Discharging 
           Device-2: hidpp_battery_1 model: Logitech Wireless Keyboard charge: 55% (should be ignored) status: Discharging 
CPU:       Topology: Triple Core model: AMD Ryzen 7 3750H with Radeon Vega Mobile Gfx bits: 64 type: MCP arch: Zen+ rev: 1 
           L2 cache: 1536 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 18366 
           Speed: 3971 MHz min/max: 1400/2300 MHz Core speeds (MHz): 1: 3971 2: 2235 3: 2219 4: 2215 5: 2262 6: 3992 7: 1597 
           8: 1597 
Graphics:  Device-1: NVIDIA TU117M [GeForce GTX 1650 Mobile / Max-Q] vendor: ASUSTeK driver: N/A bus ID: 01:00.0 
           Device-2: Advanced Micro Devices [AMD/ATI] Picasso vendor: ASUSTeK driver: amdgpu v: kernel bus ID: 05:00.0 
           Display: x11 server: X.Org 1.20.8 driver: modesetting FAILED: ati unloaded: amdgpu,fbdev,vesa 
           resolution: 1920x1080~60Hz 
           OpenGL: renderer: AMD RAVEN (DRM 3.35.0 5.4.0-42-generic LLVM 10.0.0) v: 4.6 Mesa 20.0.8 direct render: Yes 
Audio:     Device-1: Advanced Micro Devices [AMD] Family 17h HD Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel 
           bus ID: 05:00.6 
           Sound Server: ALSA v: k5.4.0-42-generic 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: ASUSTeK driver: r8169 v: kernel port: e000 
           bus ID: 02:00.0 
           IF: enp2s0 state: down mac: <filter> 
           Device-2: Realtek RTL8821CE 802.11ac PCIe Wireless Network Adapter vendor: AzureWave driver: rtl8821ce 
           v: v5.5.2.1_35598.20191029 port: d000 bus ID: 04:00.0 
           IF: wlp4s0 state: up mac: <filter> 
           IF-ID-1: br-24b3ba30064e state: up speed: N/A duplex: N/A mac: <filter> 
           IF-ID-2: br-c381c0110df3 state: down mac: <filter> 
           IF-ID-3: docker0 state: down mac: <filter> 
           IF-ID-4: veth1954134 state: up speed: 10000 Mbps duplex: full mac: <filter> 
           IF-ID-5: veth4e3945e state: up speed: 10000 Mbps duplex: full mac: <filter> 
           IF-ID-6: veth69fdef0 state: up speed: 10000 Mbps duplex: full mac: <filter> 
           IF-ID-7: veth6b8dae3 state: up speed: 10000 Mbps duplex: full mac: <filter> 
           IF-ID-8: veth9317d46 state: up speed: 10000 Mbps duplex: full mac: <filter> 
           IF-ID-9: vethb6ff4f7 state: up speed: 10000 Mbps duplex: full mac: <filter> 
           IF-ID-10: vethc822a39 state: up speed: 10000 Mbps duplex: full mac: <filter> 
           IF-ID-11: vethf5a5193 state: up speed: 10000 Mbps duplex: full mac: <filter> 
Drives:    Local Storage: total: 476.94 GiB used: 276.88 GiB (58.1%) 
           ID-1: /dev/nvme0n1 vendor: Intel model: SSDPEKNW512G8 size: 476.94 GiB 
           Message: No Optical or Floppy data was found. 
Partition: ID-1: / size: 327.64 GiB used: 276.85 GiB (84.5%) fs: ext4 dev: /dev/nvme0n1p5 
Sensors:   System Temperatures: cpu: 42.9 C mobo: N/A gpu: amdgpu temp: 42 C 
           Fan Speeds (RPM): cpu: 2300 
Info:      Processes: 454 Uptime: 1h 01m Memory: 30.87 GiB used: 8.61 GiB (27.9%) Init: systemd runlevel: 5 Compilers: 
           gcc: 9.3.0 Shell: zsh v: 5.8 inxi: 3.0.38