I have downloaded the latest IOS( endeavouros-2021.08.27-x86_64.iso) and burned the bootable usb through Echer, boot the installation by nvidia one.
then show the result like the pic below, and then i got a black screen!
A start job is running for monitoring of LVM2 mirrors snapshots etc…
My device info:
Who can help me!?
Perhaps this thread can help you further:
But right now I can not even access to the live desktop~ 
Read the thread carefully, then boot the Live ISO and chroot into your system to replicate the steps offered in the thread. To chroot, follow the steps in this article:
Sorry, the problem what I’m facing is I can’t boot the install live ISO.
you mentioned using arch-chroot, that is to let me mout the install usb into other pc first and use chroot method to do somefihing with the install usb system?
You can try to boot with free drivers to continue in live iso, it should work
P.S. Welcome aboard! 
Sorry for the confusion. Have you tried the non nvidia option? That one should work, but a little advice in your particular case, wait for the next release that will be out on Friday.
i have tried it, but didn’t work as well~t
Never mind. the free option gets almost the same result, alse get with the line
A start job is running for monitoring of LVM2 mirrors snapshots etc…
and then black screen.
Again, wait for the next release that is due this Friday. 
What’s the error?
A start job is running for monitoring of LVM2 mirrors snapshots etc…
That’s not an error message; if the start job succeeds (like the others that say [OK]) it’s completely irrelevant.
Which is set as your primary GPU, and which is wired to output to the panel?
oh thanks for letting me know that.
my primary gpu is nvidia, what do mean wired to output??
Laptops have internal circuitry, and different models will connect either the iGPU or dGPU to the different outputs (e.g. on my new laptop, the iGPU is wired to the panel and dGPU to the HDMI port “for performance” 
).
This means if the “wrong” GPU is initialised then you end up with no output.
In this case, I can see references to setting the amdgpu backlight, which may mean the iGPU is being used for the internal panel.
Check in your BIOS to see if you can switch the laptop panel to the iGPU (might be called “switchable graphics”).
The BIOS in my laptop is not able to disable the GPU like this, maybe I have to give it up and use Ubantu instead. I just cant install both manjaro and EndeavourOS.
Are you able to boot on a another linux and provide the output of your hardware?
inxi -Faz --no-host
System: Kernel: 5.11.0-40-generic x86_64 bits: 64 compiler: N/A
parameters: BOOT_IMAGE=/boot/vmlinuz-5.11.0-40-generic
root=UUID=9b1b4262-de39-4fc1-b182-5f97ccc4606f ro quiet splash
nvme_core.default_ps_max_latency_us=5500 amdgpu.exp_hw_support=1 acpi_osi=Linux
cpi_backlight=vendor vt.handoff=7
Desktop: Gnome 3.36.9 info: plank wm: gnome-shell dm: GDM3 3.36.3
Distro: Ubuntu 20.04.3 LTS (Focal Fossa)
Machine: Type: Laptop System: ASUSTeK product: ASUS TUF Gaming A15 FA506IV_FA506IV v: 1.0
serial: <filter>
Mobo: ASUSTeK model: FA506IV v: 1.0 serial: <filter> UEFI: American Megatrends v: FA506IV.316
date: 03/12/2021
Battery: ID-1: BAT1 charge: 32.0 Wh condition: 33.0/48.1 Wh (69%) volts: 12.5/11.7 model: ASUS A32-K55
type: Li-ion serial: <filter> status: Unknown
Device-1: hidpp_battery_0 model: Logitech Marathon Mouse/Performance Plus M705 serial: <filter>
charge: 55% (should be ignored) rechargeable: yes status: Discharging
CPU: Topology: 8-Core model: AMD Ryzen 7 4800H with Radeon Graphics bits: 64 type: MT MCP arch: Zen
family: 17 (23) model-id: 60 (96) stepping: 1 microcode: 8600104 L2 cache: 4096 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 92629
Speed: 1391 MHz min/max: 1400/2900 MHz boost: enabled Core speeds (MHz): 1: 1390 2: 1334
3: 1397 4: 1397 5: 3352 6: 1889 7: 1697 8: 1258 9: 1378 10: 1363 11: 1396 12: 1439 13: 1218
14: 1856 15: 1397 16: 1397
Vulnerabilities: Type: itlb_multihit status: Not affected
Type: l1tf status: Not affected
Type: mds status: Not affected
Type: meltdown status: Not affected
Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via prctl and seccomp
Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer sanitization
Type: spectre_v2
mitigation: Full AMD retpoline, IBPB: conditional, IBRS_FW, STIBP: conditional, RSB filling
Type: srbds status: Not affected
Type: tsx_async_abort status: Not affected
Graphics: Device-1: NVIDIA TU106 [GeForce RTX 2060] vendor: ASUSTeK driver: nvidia v: 470.82.00
bus ID: 01:00.0 chip ID: 10de:1f15
Device-2: AMD Renoir vendor: ASUSTeK driver: amdgpu v: kernel bus ID: 06:00.0
chip ID: 1002:1636
Display: x11 server: X.Org 1.20.11 driver: amdgpu,ati,nvidia
unloaded: fbdev,modesetting,nouveau,vesa compositor: gnome-shell
resolution: 1920x1080~144Hz, 1920x1080~60Hz
OpenGL: renderer: NVIDIA GeForce RTX 2060/PCIe/SSE2 v: 4.6.0 NVIDIA 470.82.00
direct render: Yes
Audio: Device-1: NVIDIA TU106 High Definition Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel
bus ID: 01:00.1 chip ID: 10de:10f9
Device-2: AMD vendor: ASUSTeK driver: snd_hda_intel v: kernel bus ID: 06:00.1
chip ID: 1002:1637
Device-3: AMD Raven/Raven2/FireFlight/Renoir Audio Processor driver: N/A bus ID: 06:00.5
chip ID: 1022:15e2
Device-4: AMD Family 17h HD Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel
bus ID: 06:00.6 chip ID: 1022:15e3
Sound Server: ALSA v: k5.11.0-40-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 chip ID: 10ec:8168
IF: enp2s0 state: down mac: <filter>
Device-2: Realtek RTL8822CE 802.11ac PCIe Wireless Network Adapter vendor: AzureWave
driver: rtw_8822ce v: N/A port: d000 bus ID: 03:00.0 chip ID: 10ec:c822
IF: wlp3s0 state: up mac: <filter>
IF-ID-1: docker0 state: down mac: <filter>
Drives: Local Storage: total: 1.43 TiB used: 869.89 GiB (59.3%)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/nvme0n1 vendor: Western Digital model: WDS500G1B0C-00S6U0 size: 465.76 GiB
block size: physical: 512 B logical: 512 B speed: 15.8 Gb/s lanes: 2 serial: <filter>
rev: 201000WD scheme: GPT
ID-2: /dev/nvme1n1 vendor: Kingston model: OM8PCP3512F-AB size: 476.94 GiB block size:
physical: 512 B logical: 512 B speed: 31.6 Gb/s lanes: 4 serial: <filter> rev: ECFK52.3
ID-3: /dev/sda vendor: Western Digital model: WDS100T2B0A-00SM50 size: 931.51 GiB block size:
physical: 512 B logical: 512 B speed: 6.0 Gb/s serial: <filter> rev: 00WD scheme: GPT
ID-4: /dev/sdb type: USB model: aigo U330 size: 29.30 GiB block size: physical: 512 B
logical: 512 B serial: <filter> rev: 0000 scheme: MBR
SMART Message: Unknown USB bridge. Flash drive/Unsupported enclosure?
ID-5: /dev/sdc type: USB vendor: SanDisk model: Ultra USB 3.0 size: 28.64 GiB block size:
physical: 512 B logical: 512 B serial: <filter> rev: 1.00 scheme: MBR
SMART Message: Unknown USB bridge. Flash drive/Unsupported enclosure?
Partition: ID-1: / raw size: 93.13 GiB size: 91.17 GiB (97.89%) used: 43.22 GiB (47.4%) fs: ext4
dev: /dev/nvme0n1p1
ID-2: /home raw size: 338.94 GiB size: 332.62 GiB (98.14%) used: 287.82 GiB (86.5%) fs: ext4
dev: /dev/nvme0n1p9
ID-3: swap-1 size: 32.74 GiB used: 0 KiB (0.0%) fs: swap swappiness: 60 (default)
cache pressure: 100 (default) dev: /dev/nvme0n1p6
Sensors: System Temperatures: cpu: 55.4 C mobo: N/A
Fan Speeds (RPM): cpu: 2500
GPU: device: nvidia screen: :1.0 temp: 48 C device: amdgpu temp: 49 C
Info: Processes: 511 Uptime: 20m Memory: 30.78 GiB used: 8.95 GiB (29.1%) Init: systemd v: 245
runlevel: 5 Compilers: gcc: 9.3.0 alt: 8/9 clang: 10.0.0-4ubuntu1 Shell: zsh v: 5.8
running in: gnome-terminal inxi: 3.0.38
Are you able to try these kernel parameters on the EndeavourOS live ISO?
Do you have a link to the forum thread where you asked for help? Perhaps there’s information there that would prevent duplication of effort.
Maybe. If something works then use it until the thing that doesn’t work works. That also means it doesn’t look like you’re trying to make people feel guilty that they can’t help you.
You might also want to look at the various log files that are available, for example /var/log/Xorg.0.log or when running startx in a terminal: