Strange graphical issues when disabling CSM?

[Guest]

So I have a UEFI install of Windows and I'm having a few issues (mainly graphical issues) when disabling CSM. 

 

Problem 1: The Displays (main issue).

 

I have 3x AOC G2460PQU displays connected to my PALIT GTX 980 via Mini DisplayPort. 

 

Everything works fine but if I disable CSM in BIOS, I sometimes get a few strange issues when booting.

 

Firstly, sometimes when booting one or two of the monitors don't get detected by Windows, it can sometimes take 10 - 15 seconds for Windows to detect one of the monitors on boot. Also, sometimes the monitor doesn't get detected at all and in "Display settings" the monitor shows as "disconnected" and cannot be re - enabled unless I reboot or turn the monitor on and off. This doesn't just happen with one specific monitor, in can happen with any 3 of them.

 

Another problem that happened to me was when I had to restart my PC yesterday to update AVG, the Windows login screen changed from the right monitor (the monitor set to main)  to the middle monitor and just got stuck. The login screen would just keep flashing on and off, over and over again. I had to do a hard reset (press power button) to get out of this cycle. 

 

Finally, when in BIOS (the BIOS appears on the LEFT screen) the middle and right monitors try and turn on by themselves (power light goes from orange to green) and then say "no signal" and turn off again, this happened every few minutes. It is like they are trying to be detected by something.

 

So what is causing this? Is it the monitors? The OS? The GPU?

 

 

 

Problem 2: Hard Drive not appearing in BIOS (more of a side issue).

 

When disabling CSM, my optical drive and Hard Drive do not show up in the BIOS boot menu. Only my SSD (Windows boot manager) and any USB devices show up. 

 

 

 

 

 

[Droidbot]

Why are you disabling CSM though? 

 

1) Seems like the GPU isn't complying 100% with either UEFI or BIOS spec (you haven't stated)

2) Assuming UEFI, it checks all drives and only shows the active ones in the boot menu, whereas CSM makes it check for UEFI and doesn't bother with checking for BIOS so it displays everything. 

 

[Guest]

37 minutes ago, Droidbot said:

Why are you disabling CSM though? 

 

1) Seems like the GPU isn't complying 100% with either UEFI or BIOS spec (you haven't stated)

2) Assuming UEFI, it checks all drives and only shows the active ones in the boot menu, whereas CSM makes it check for UEFI and doesn't bother with checking for BIOS so it displays everything. 

 

I'm disabling CSM so I can be in "full UEFI" mode as it leads to much faster boot times (10 seconds or so).

 

My Motherbord is the ASUS Maxiumus Gene VII mATX and it has been updated with the newest BIOS. 

 

On the manufacturers website (PALIT) it states it is UEFI supported so I'm not sure why I would be having problems. Once booted everything seems to work fine.

 

If I use DVI (right monitor), DP (middle monitor) and mHDMI (left monitor) I don't get the weird monitor thing where they switch on/off in the BIOS but I still do get strange booting issues. I have tried many different cables and combinations but they don't change anything.

[Guest]

2 hours ago, Droidbot said:

Why are you disabling CSM though? 

 

1) Seems like the GPU isn't complying 100% with either UEFI or BIOS spec (you haven't stated)

2) Assuming UEFI, it checks all drives and only shows the active ones in the boot menu, whereas CSM makes it check for UEFI and doesn't bother with checking for BIOS so it displays everything. 

 

Bump, anyone?

[0ld_Chicken]

Thread moved to Troubleshooting

[Guest]

Bump, pretty lost on what to do here, any got anything I could try?

[Guest]

Anyone? :C

[Droidbot]

Massive shot in the dark, but make a Windows USB installer as GPT for full UEFI support instead of usual MBR for BIOS/CSM support. 

[Guest]

11 hours ago, Droidbot said:

Massive shot in the dark, but make a Windows USB installer as GPT for full UEFI support instead of usual MBR for BIOS/CSM support. 

Hmm, thanks, but is that likely to stop the weird issues though? I can't really see how it would.

 

 

[Droidbot]

8 hours ago, Celios said:

Hmm, thanks, but is that likely to stop the weird issues though? I can't really see how it would.

 

 

CSM adds features that normal UEFI doesn't have, so in theory reinstalling the OS may fix your issue. 

 

Windows usually makes install disks for BIOS and UEFI+CSM installs, not normal UEFI installs. 

Have you tried reinstalling GPU drivers also? 

[Guest]

3 hours ago, Droidbot said:

CSM adds features that normal UEFI doesn't have, so in theory reinstalling the OS may fix your issue. 

 

Windows usually makes install disks for BIOS and UEFI+CSM installs, not normal UEFI installs. 

Have you tried reinstalling GPU drivers also? 

Is it really worth going through all the trouble, do the benefits of disabling CSM really warrant doing a clean install for?

 

My main concern is if the fault is the monitors, it wouldn't be that, right?

 

And yes, I did try reinstalling the GPU drivers.

[Guest]

12 hours ago, Droidbot said:

CSM adds features that normal UEFI doesn't have, so in theory reinstalling the OS may fix your issue. 

 

Windows usually makes install disks for BIOS and UEFI+CSM installs, not normal UEFI installs. 

Have you tried reinstalling GPU drivers also? 

So could the monitors be the issue or is it unlikely?

[Droidbot]

9 hours ago, Celios said:

Is it really worth going through all the trouble, do the benefits of disabling CSM really warrant doing a clean install for?

 

My main concern is if the fault is the monitors, it wouldn't be that, right?

 

And yes, I did try reinstalling the GPU drivers.

If you have your data on the disk, no. 

And it's not the monitors, it's just the OS being strange. 

This is Windows afterall, let's be honest here. 

 

Sorry for the late response btw, forgot about this thread as I was at school

[Guest]

49 minutes ago, Droidbot said:

If you have your data on the disk, no. 

And it's not the monitors, it's just the OS being strange. 

This is Windows afterall, let's be honest here. 

 

Sorry for the late response btw, forgot about this thread as I was at school

Oh no problem, sorry for being an annoyance, haha. 

 

I guess I won't bother reinstalling yet then. I'll try and fiddle around with things next time I need to do a clean install. 

 

Also, the only reason I suspected the monitors is because once when one of the monitors was showing up as "disconnected" in Windows' "Display Settings", it got a signal with HDMI and DVI, it would just not work with mDisplayport. The way I resolved this strange issue was highlighting "DP" in the monitor's menu and then making the (disconnected) monitor my main display in "Display Settings" and it suddenly got a signal.

 

Strange that it would only let me re - enable the monitor in Display Settings if I selected "DP" in the monitor menu and "make this my main display" in the Windows Display Settings at the same time, right? I think I would have been pretty screwed if I would have had only a single monitor.