BIOS/BOOT display issue

[steve45]

Just built new PC, having display issues with BIOS/BOOT screens, graphical artefacts and screen blackout etc when running on main display, Samsung 49" 5120x1440. Is there any way to fix this? I have been having to use a workaround of connecting a 1080p display when wanting to access BIOS which is a bit of a nuisance, but it does display correctly when connected to the smaller monitor.
BIOS updated, No issues when system is running, just a frustrating issue when running in BIOS and when booting into windows. Assuming this is an issue relating to the difficulty to output to such a large display?

Spec is as follows and everything has been updated accordingly with most up to date firmwares/BIOS etc

AMD 7800X3D
Asus rog strix b650-a Gaming wifi
32gb Corsair Vengeance RGB 6000
RTX 5070ti
Samsung 2tb 9100

On a secondary note, I have found the initial boot time to be very excessive. I can be sitting waiting for a minimum of at least 15-20sec with all fans on max before the BIOS boot screen even appears.
This is not something I'm used to with my old Intel 9 series build. Is this just an AMD or an Asus thing? There are no issues just seems excessively slow?

 

[Mcnumpty2323]

Check for monitor firmware update

If that doesn't help
Not a fix but probably an easier workaround than
Having to connect a 1080p monitor
To access the bios

Enable pip or pbp on the monitor when you want
To enter the bios (press little joystick or whatever the monitor uses
To show its menu options)
One or both of those should allow screen splitting
Set to 2560 x 1440p and bios should display OK
Your monitor may allow setting hot keys to do this faster
Once you're out the bios Or onto the desktop
Turn off pip/pbp

Slow boot time may be related to memory training
There may be a bios setting like remember last used memory speed/timings
Or something similar
Don't have am5/ddr5 so not really familiar with this part

 

[Werewolf]

If it's ok on the smaller, lower res monitor have you tried a different video cable for the main monitor?

I ask as my brothers Samsung curved screen had some issues initially but changing the connecting cable to a newer/higher standard one fixed it.

 

[steve45]

Check for monitor firmware update

If that doesn't help
Not a fix but probably an easier workaround than
Having to connect a 1080p monitor
To access the bios

Enable pip or pbp on the monitor when you want
To enter the bios (press little joystick or whatever the monitor uses
To show its menu options)
One or both of those should allow screen splitting
Set to 2560 x 1440p and bios should display OK
Your monitor may allow setting hot keys to do this faster
Once you're out the bios Or onto the desktop
Turn off pip/pbp

Slow boot time may be related to memory training
There may be a bios setting like remember last used memory speed/timings
Or something similar
Don't have am5/ddr5 so not really familiar with this part

Thanks for the input! Frustratingly there dosnt appear to be a firmware update available for my monitor C49RG9 (LC49RG90SSPXXU), At least not that I could find on the website. It is currently on Ver 1004.6 if that makes any difference.
The PBP idea does the trick though, displays the BIOS perfectly. Cheers, that saves a lot of hassle!
As for the slower boot I tried changing that setting, I cant say for sure but it dosnt feel any faster. Its not a huge issue at all just didnt expect such a long time to boot.

If it's ok on the smaller, lower res monitor have you tried a different video cable for the main monitor?

I ask as my brothers Samsung curved screen had some issues initially but changing the connecting cable to a newer/higher standard one fixed it.

I've tried a few cables of differing quality in both DP and HDMI with no discernible difference, that was my immediate thought when I first turned on the PC after building it. Its currently on a decent quality HDMI 2.1 cable which works flawlessly when it has booted into windows though which is the confusing thing.


I'm quite content to make do with the PBP solution. However it would be interesting if anyone has further suggestions to figure out the root cause.

 

[Mcnumpty2323]

Glad that worked for you

To be honest not totally sure you will find a solution
Other than future bios updates
It's a very unusual resolution on your monitor
And the bios doesn't have access to a driver like windows does
To be able to adjust to that resolution

The bios I think uses a standard api ( application programming interface)
Rather than a driver
So basically your bios has to have 5120 x 1440 built into
It's list of possible resolutions to be able to display the bios
Would be a way of looking at it

 

[therealdippy]

I have the Samsung LS49AG950 connected to an RTX 3090 on AM platform and I have never had a BIOS display problem.
I'm inclined to suspect that it is related to the long boot time. Is the display completely blank from power-on for that 15-20 seconds? Are you definitely on the latest BIOS for that motherboard?

 

[steve45]

I have the Samsung LS49AG950 connected to an RTX 3090 on AM platform and I have never had a BIOS display problem.
I'm inclined to suspect that it is related to the long boot time. Is the display completely blank from power-on for that 15-20 seconds? Are you definitely on the latest BIOS for that motherboard?

Definitely on latest BIOS. Completely blank for that time. I say that, however this morning, there was no delayed boot? Possibly that memory training setting has actually worked?