Imac Nvidia Install failure. It boots to black and white striped rectangles

When I boot by USB stick to install everything is fine but after install and reboot I get a monitor with lots of boxes made of black and white stripes.

I’m not sure what to do next. The alt-f2 does bring me to a working command line so it must be the graphics card.

Operating System: Manjaro Linux
KDE Plasma Version: 6.1.5
KDE Frameworks Version: 6.6.0
Qt Version: 6.7.2
Kernel Version: 6.10.13-3-MANJARO (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i7-4771 CPU @ 3.50GHz
Memory: 23.4 GiB of RAM
Graphics Processor: NVE4
Manufacturer: Apple Inc.
Product Name: iMac14,2
System Version: 1.0

00:00.0 Host bridge: Intel Corporation 4th Gen Core Processor DRAM Controller (rev 06)
Subsystem: Apple Inc. Device 0123
Flags: bus master, fast devsel, latency 0
Capabilities:
Kernel driver in use: hsw_uncore

00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06) (prog-if 00 [Normal decode])
Subsystem: Apple Inc. Device 0123
Flags: bus master, fast devsel, latency 0, IRQ 24
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 3000-3fff [size=4K] [16-bit]
Memory behind bridge: b0000000-b10fffff [size=17M] [32-bit]
Prefetchable memory behind bridge: 90000000-a1ffffff [size=288M] [32-bit]
Capabilities:
Kernel driver in use: pcieport

00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05) (prog-if 30 [XHCI])
Subsystem: Intel Corporation Device 7270
Flags: bus master, medium devsel, latency 0, IRQ 36
Memory at b1d00000 (64-bit, non-prefetchable) [size=64K]
Capabilities:
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci

00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
Subsystem: Intel Corporation Device 7270
Flags: bus master, fast devsel, latency 0, IRQ 63
Memory at b1d15900 (64-bit, non-prefetchable) [size=16]
Capabilities:
Kernel driver in use: mei_me
Kernel modules: mei_me

00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)
Subsystem: Intel Corporation Device 7270
Flags: bus master, fast devsel, latency 0, IRQ 64
Memory at b1d10000 (64-bit, non-prefetchable) [size=16K]
Capabilities:
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d5) (prog-if 00 [Normal decode])
Subsystem: Intel Corporation Device 7270
Flags: bus master, fast devsel, latency 0, IRQ 25
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: 2000-2fff [size=4K] [16-bit]
Memory behind bridge: b1c00000-b1cfffff [size=1M] [32-bit]
Prefetchable memory behind bridge: [disabled] [64-bit]
Capabilities:
Kernel driver in use: pcieport

00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d5) (prog-if 00 [Normal decode])
Subsystem: Intel Corporation Device 7270
Flags: bus master, fast devsel, latency 0, IRQ 26
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: [disabled] [16-bit]
Memory behind bridge: b1800000-b1afffff [size=3M] [32-bit]
Prefetchable memory behind bridge: [disabled] [64-bit]
Capabilities:
Kernel driver in use: pcieport

00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d5) (prog-if 00 [Normal decode])
Subsystem: Intel Corporation Device 7270
Flags: bus master, fast devsel, latency 0, IRQ 27
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
I/O behind bridge: [disabled] [16-bit]
Memory behind bridge: [disabled] [32-bit]
Prefetchable memory behind bridge: b1b00000-b1bfffff [size=1M] [32-bit]
Capabilities:
Kernel driver in use: pcieport

00:1c.4 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #5 (rev d5) (prog-if 00 [Normal decode])
Subsystem: Intel Corporation Device 7270
Flags: bus master, fast devsel, latency 0, IRQ 28
Bus: primary=00, secondary=05, subordinate=9b, sec-latency=0
I/O behind bridge: 5000-7fff [size=12K] [16-bit]
Memory behind bridge: b1e00000-bdefffff [size=193M] [32-bit]
Prefetchable memory behind bridge: bdf00000-c9efffff [size=192M] [32-bit]
Capabilities:
Kernel driver in use: pcieport

00:1f.0 ISA bridge: Intel Corporation Z87 Express LPC Controller (rev 05)
Subsystem: Intel Corporation Device 7270
Flags: bus master, medium devsel, latency 0
Capabilities:
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich

00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05) (prog-if 01 [AHCI 1.0])
Subsystem: Intel Corporation Device 7270
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 34
I/O ports at 4088 [size=8]
I/O ports at 4094 [size=4]
I/O ports at 4080 [size=8]
I/O ports at 4090 [size=4]
I/O ports at 4060 [size=32]
Memory at b1d15000 (32-bit, non-prefetchable) [size=2K]
Capabilities:
Kernel driver in use: ahci

00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05)
Subsystem: Intel Corporation Device 7270
Flags: medium devsel, IRQ 18
Memory at b1d15800 (64-bit, non-prefetchable) [size=256]
I/O ports at efa0 [size=32]
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801

01:00.0 VGA compatible controller: NVIDIA Corporation GK104M [GeForce GTX 775M Mac Edition] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Apple Inc. Device 0120
Flags: bus master, fast devsel, latency 0, IRQ 60
Memory at b0000000 (32-bit, non-prefetchable) [size=16M]
Memory at 90000000 (64-bit, prefetchable) [size=256M]
Memory at a0000000 (64-bit, prefetchable) [size=32M]
I/O ports at 3000 [size=128]
Expansion ROM at b1000000 [disabled] [size=512K]
Capabilities:
Kernel driver in use: nouveau
Kernel modules: nouveau

01:00.1 Audio device: NVIDIA Corporation GK104 HDMI Audio Controller (rev a1)
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at b1080000 (32-bit, non-prefetchable) [size=16K]
Capabilities:
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

02:00.0 SATA controller: Marvell Technology Group Ltd. 88SS9183 PCIe SSD Controller (rev 14) (prog-if 01 [AHCI 1.0])
Subsystem: Marvell Technology Group Ltd. 88SS9183 PCIe SSD Controller
Flags: bus master, fast devsel, latency 0, IRQ 35
I/O ports at 2028 [size=8]
I/O ports at 2034 [size=4]
I/O ports at 2020 [size=8]
I/O ports at 2030 [size=4]
I/O ports at 2000 [size=32]
Memory at b1c00000 (32-bit, non-prefetchable) [size=512]
Expansion ROM at b1c20000 [disabled] [size=128K]
Capabilities:
Kernel driver in use: ahci

03:00.0 Network controller: Broadcom Inc. and subsidiaries BCM4360 802.11ac Dual Band Wireless Network Adapter (rev 03)
Subsystem: Apple Inc. Device 0111
Flags: bus master, fast devsel, latency 0, IRQ 18
Memory at b1a00000 (64-bit, non-prefetchable) [size=32K]
Memory at b1800000 (64-bit, non-prefetchable) [size=2M]
Capabilities:
Kernel driver in use: bcma-pci-bridge
Kernel modules: bcma

04:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM57766 Gigabit Ethernet PCIe (rev 01)
Subsystem: Broadcom Inc. and subsidiaries NetXtreme BCM57766 Gigabit Ethernet PCIe
Flags: bus master, fast devsel, latency 0, IRQ 19
Memory at b1b00000 (64-bit, prefetchable) [size=64K]
Memory at b1b10000 (64-bit, prefetchable) [size=64K]
Capabilities:
Kernel driver in use: tg3
Kernel modules: tg3

04:00.1 SD Host controller: Broadcom Inc. and subsidiaries BCM57765/57785 SDXC/MMC Card Reader (rev 01) (prog-if 01)
Subsystem: Broadcom Inc. and subsidiaries Device 96bc
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at b1b20000 (64-bit, prefetchable) [size=64K]
Capabilities:
Kernel driver in use: sdhci-pci
Kernel modules: sdhci_pci

05:00.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03) (prog-if 00 [Normal decode])
Subsystem: Device 2222:1111
Flags: bus master, fast devsel, latency 0, IRQ 16
Bus: primary=05, secondary=06, subordinate=6b, sec-latency=0
I/O behind bridge: 5000-6fff [size=8K] [16-bit]
Memory behind bridge: b1e00000-b9efffff [size=129M] [32-bit]
Prefetchable memory behind bridge: bdf00000-c5efffff [size=128M] [32-bit]
Capabilities:
Kernel driver in use: pcieport

06:00.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03) (prog-if 00 [Normal decode])
Subsystem: Device 2222:1111
Flags: bus master, fast devsel, latency 0, IRQ 29
Bus: primary=06, secondary=07, subordinate=07, sec-latency=0
I/O behind bridge: [disabled] [32-bit]
Memory behind bridge: b1e00000-b1efffff [size=1M] [32-bit]
Prefetchable memory behind bridge: [disabled] [64-bit]
Capabilities:
Kernel driver in use: pcieport

06:03.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03) (prog-if 00 [Normal decode])
Subsystem: Device 2222:1111
Physical Slot: 2
Flags: bus master, fast devsel, latency 0, IRQ 30
Bus: primary=06, secondary=08, subordinate=38, sec-latency=0
I/O behind bridge: 5000-5fff [size=4K] [16-bit]
Memory behind bridge: b1f00000-b5efffff [size=64M] [32-bit]
Prefetchable memory behind bridge: bdf00000-c1efffff [size=64M] [32-bit]
Capabilities:
Kernel driver in use: pcieport

06:04.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03) (prog-if 00 [Normal decode])
Subsystem: Device 2222:1111
Physical Slot: 3
Flags: bus master, fast devsel, latency 0, IRQ 31
Bus: primary=06, secondary=39, subordinate=69, sec-latency=0
I/O behind bridge: 6000-6fff [size=4K] [16-bit]
Memory behind bridge: b5f00000-b9efffff [size=64M] [32-bit]
Prefetchable memory behind bridge: c1f00000-c5efffff [size=64M] [32-bit]
Capabilities:
Kernel driver in use: pcieport

06:05.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03) (prog-if 00 [Normal decode])
Subsystem: Device 2222:1111
Physical Slot: 4
Flags: bus master, fast devsel, latency 0, IRQ 32
Bus: primary=06, secondary=6a, subordinate=6a, sec-latency=0
I/O behind bridge: [disabled] [32-bit]
Memory behind bridge: [disabled] [32-bit]
Prefetchable memory behind bridge: [disabled] [64-bit]
Capabilities:
Kernel driver in use: pcieport

06:06.0 PCI bridge: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03) (prog-if 00 [Normal decode])
Subsystem: Device 2222:1111
Physical Slot: 5
Flags: bus master, fast devsel, latency 0, IRQ 33
Bus: primary=06, secondary=6b, subordinate=6b, sec-latency=0
I/O behind bridge: [disabled] [32-bit]
Memory behind bridge: [disabled] [32-bit]
Prefetchable memory behind bridge: [disabled] [64-bit]
Capabilities:
Kernel driver in use: pcieport

07:00.0 System peripheral: Intel Corporation DSL3510 Thunderbolt Controller [Cactus Ridge 4C 2012] (rev 03)
Subsystem: Device 2222:1111
Physical Slot: 1
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at b1e00000 (32-bit, non-prefetchable) [size=256K]
Memory at b1e40000 (32-bit, non-prefetchable) [size=4K]
Capabilities:
Kernel driver in use: thunderbolt
Kernel modules: thunderbolt

can you log in from tty, when you run startx?