Asus BE248QF

noseph · 2026-06-09 13:43

I am attempting to replace my aging/failing Samsung SyncMaster 2243 with an Asus BE248QF on a Lenovo IdeaCentre 300S-08IHH, Core I5-4460S @ 2.90GHz,15 GiB of RAM, Mesa Intel HD Graphics 4400. The issue I am having is that the only way I can get the system to boot without the display constantly blanking is to add nomodeset to the GRUB boot menu.This however limits the Graphic Platform to X11. Is there a graphics driver I need to load to correct this issue?

q4osteam · 2026-06-09 14:08

This issue is hardware dependent, so we can only recommend you try to search solutions for Debian, it will work for Q4OS as well. In addition, we attach AI response, so you can review it to get some useful tips.

AI:
Probably not a missing driver. On Debian, your **Intel HD Graphics 4400 (Haswell generation)** is normally supported by the kernel's built-in **i915** driver, and Mesa provides the 3D acceleration. In most cases, no additional graphics driver package is required.

The clue is that:

* The system works with **nomodeset**.
* Without it, the display repeatedly blanks during boot.
* The problem appeared when switching monitors.

`nomodeset` disables **Kernel Mode Setting (KMS)**, which means the Intel i915 driver never takes control of the display hardware. That suggests the issue is occurring when the i915 driver initializes the monitor connection, not because the driver is absent.

### First: Verify the Intel driver is loading

Boot **without** `nomodeset` if possible (even if the screen blanks intermittently), then switch to a text console with Ctrl+Alt+F2 if you can, or SSH in from another machine.

Check:

```bash
lspci -k | grep -A3 VGA
```

You should see something like:

```
Kernel driver in use: i915
```

Also:

```bash
lsmod | grep i915
```

and

```bash
dmesg | grep -iE "i915|drm|edid"
```

Look for errors.

### Check which connection you're using

The Lenovo IdeaCentre 300S-08IHH typically provides some combination of:

* VGA
* HDMI
* DisplayPort (varies by model)

The Asus BE248QF supports:

* VGA
* DVI-D
* DisplayPort
* HDMI (depending on regional model)

The symptoms you describe often result from:

1. Bad EDID negotiation between monitor and GPU.
2. DisplayPort link training issues.
3. HDMI timing/refresh-rate problems.
4. A marginal cable.

Questions:

* What cable are you using (VGA, HDMI, DVI, DP)?
* Does the blanking begin during kernel startup, or only after the graphical login screen appears?
* What Debian version and kernel version are installed?

### Check for EDID problems

After booting with `nomodeset`, run:

```bash
xrandr --verbose
```

and post the output for the connected display.

Also:

```bash
sudo dmesg | grep -i edid
```

If the monitor's EDID is being misread, the kernel may be selecting an unsupported mode.

### Try forcing a mode

Many Haswell systems behave better when a specific mode is forced.

Identify the connector:

```bash
xrandr
```

You might see:

```
HDMI-1 connected
```

or

```
DP-1 connected
```

Then add a kernel parameter in GRUB such as:

```text
video=HDMI-A-1:1920x1200@60
```

or

```text
video=DP-1:1920x1200@60
```

The BE248QF's native resolution is **1920×1200 at 60 Hz**.

### Ensure firmware is installed

On Debian, make sure Intel firmware is present:

```bash
sudo apt install firmware-misc-nonfree
```

(On newer Debian releases, the exact package names can vary slightly.)

### Check your current graphics stack

Please provide:

```bash
cat /etc/debian_version
uname -a
lspci -nnk | grep -A3 VGA
```

and tell me:

1. Which video cable you're using.
2. Whether the blanking starts before login or only when X/Wayland starts.
3. Whether the Asus monitor works correctly on another computer.

With that information, I can determine whether this is an i915 KMS issue, an EDID problem, or a monitor-link negotiation problem.

noseph · 2026-06-09 15:29

1. Debian version 13.5

2. Linux IdeaCentre-300S 6.12.90+deb13.1-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.90-2 (2026-05-27) x86_64 GNU/Linux

3. 00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06)
DeviceName: Onboard IGD
Subsystem: Lenovo Device [17aa:30ed]
Kernel driver in use: i915

I am using the HDMI cable that came with the monitor. Blanking starts before login. I do not have another monitor to try at the moment.

When booting with nomodeset I get "can't open display" when running xrandr --verbose, and get nothing when running sudo udo dmesg | grep -i edid.

I am thinking that the onboard graphics may be failing. I have ordered a ASUS GeForce GT 1030 2GB GDDR5 HDMI DVI Graphics Card and will get back to you when it arrives.

Last edited by noseph (2026-06-09 15:32)

noseph · 2026-06-09 16:12

Sorry for the inconvenience but I realized that I was connecting thru an Aten CS692 KVM. Once I connected directly all is fine. The KVM HDMI must not be compatible with the Asus Monitor.

q4osteam · 2026-06-09 16:21

You are welcome Thanks for the feedback.

Q4OS Forum

#1 2026-06-09 13:43

Asus BE248QF

#2 2026-06-09 14:08

Re: Asus BE248QF

#3 2026-06-09 15:29

Re: Asus BE248QF

#4 2026-06-09 16:12

Re: Asus BE248QF

#5 2026-06-09 16:21

Re: Asus BE248QF

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