# Cursor Chat: ai-agent-book

## Metadata
- **Project**: ai-agent-book
- **Path**: `/Users/boj`
- **Date**: 2025-10-06 22:00:57
- **Session ID**: `326618b8-317a-4f45-b227-8d5cde6e780f`

## Conversation

### 👤 You

Why after boot, the console shows nothing, and the reboot failed. This is a new Proxmox VM

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### 👤 You

Why after boot, the console shows nothing, and the reboot failed. This is a new Proxmox VM

---

### 👤 You

Why after boot, the console shows nothing, and the reboot failed. This is a new Proxmox VM

---

### 🤖 Cursor Assistant

A blank console on a new Proxmox VM is typically caused by one of several common issues. Let me help you troubleshoot:

## Quick Diagnosis

First, let's check the VM configuration:

```bash
# Check VM config (replace 100 with your VM ID)
VMID=100
qm config ${VMID}

# Check if VM is actually running
qm status ${VMID}

# Try to see what's happening
qm monitor ${VMID}
```

## Common Causes & Solutions

### 1. **Wrong Display Adapter** (Most Common)

```bash
# Check current display type
qm config ${VMID} | grep vga

# Try changing to different display types:

# For Linux VMs, use std or virtio
qm set ${VMID} --vga std

# Or try serial console
qm set ${VMID} --vga serial0

# For older systems, try cirrus
qm set ${VM

---

### 👤 You

root@bojie2:/var/lib/vz/template/iso# qm config ${VMID}
agent: enabled=1
bios: seabios
boot: order=ide2;scsi0
cores: 16
cpu: host
ide2: local:iso/debian-live-11.9.0-amd64-standard.iso,media=cdrom,size=945M
memory: 65536
meta: creation-qemu=10.0.2,ctime=1759758214
name: ustc-icourse
net0: virtio=BC:24:11:A7:47:FC,bridge=vmbr0
numa: 0
ostype: l26
scsi0: nfs-storage:100/vm-100-disk-0.raw,cache=writeback,size=1T
scsihw: virtio-scsi-single
serial0: socket
smbios1: uuid=c3f59164-32fd-4012-b550-190f5638f14b
sockets: 2
unused0: local-lvm:vm-100-disk-0
vga: serial0
vmgenid: 3ebf322b-b450-42f3-b8c0-495740ea21e4
root@bojie2:/var/lib/vz/template/iso# qm status ${VMID}
status: running
root@bojie2:/var/lib/vz/template/iso# qm monitor ${VMID}
Entering QEMU Monitor for VM 100 - type 'help' for help
qm>

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### 🤖 Cursor Assistant

Ah, I found the problem! Looking at your VM config:

```
vga: serial0
```

**Your VGA is set to `serial0`**, which redirects all display output to a serial console instead of the graphical console. That's why you see nothing in the Proxmox console viewer!

## Solution: Change the Display Adapter

```bash
# Change from serial0 to a proper display adapter
qm set ${VMID} --vga std

# Then restart the VM
qm stop ${VMID}
qm start ${VMID}

# Now check the console - it should work
```

## Alternative Display Options

If `std` doesn't work, try these:

```bash
# Option 1: VirtIO GPU (best for Linux)
qm set ${VMID} --vga virtio

# Option 2: QXL (good for SPICE)
qm set ${VMID} --vga qxl

# Option 3: Cirrus (for older systems)
qm set ${VMID} --vga cirrus
```

## To Access Serial Console (If Needed)

If you actually want to use the serial console, you need to configure the guest OS to output to serial:

```bash
# On the Debian 11 VM (after fixing VGA first to access it):

# Edit GRUB config
nano /etc/default/grub

# Add/modify these lines:
GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,115200"
GRUB_TERMINAL="serial console"
GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"

# Update GRUB
update-grub

# Enable getty on serial
systemctl enable serial-getty@ttyS0.service
```

But for most users, **just use `--vga std`** and the regular console will work fine.

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*Exported from [Cursor View](https://github.com/saharmor/cursor-view)*