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BIOS Mode Confusion


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Hello all,


I am struggling with my new K95 RGB Platimum in trying to use BIOS mode.


I am going to try one more thing yet (bypassing the hubs and connecting keyboard directly to the USB port on the laptop)...but I wanted to ask this here too.


I connect my Thinkpad X1 Extreme Gen 2 to an large external monitor when I am in my home office, and to do this, I plug a small USB-C hub with USB3 ports and an HDMI port into the USB C port of my laptop. I then connect the monitor to the HDMI port on this hub, and I connect the USB hub OF MY MONITOR to one of the ports on my USB-C hub. The keyboard itself has both cables plugged into USB ports on the back of my monitor, and I also plug my wireless mouse dongle into the monitor.


The above configuration always worked fine for my older keyboards, but it didn't work for the Razer I just returned (returned for other reasons than this).


When I boot my laptop, which has a dual boot config of Windows 10 and Ubuntu 20.04, I can't enter the BIOS screen, and I cannot use the keyboard to navigate in the GRUB boot menu.


I have tried pressing the F1-Lock buttons to toggle into BIOS mode, and nothing happens. I eventually figured out that you have to hold them for several seconds (maybe 3-5 seconds) before it toggles, and the scroll lock indicator starts blinking.


If I reboot while in this state, the keyboard is still not recognized during POST or in the GRUB menu. So nothing I do seems to get this to work.


Am I just not doing this right? I am going to try a direct connection next (bypassing both the USB-C hub and the monitor hub), but if that doesn't work, I am stumped.


Any thoughts? Should any of the default lighting be happening on the keyboard when it is in BIOS mode? The blinking scroll lock indicator is the only sign of life on the keyboard when I am sitting in the GRUB menu and unable to type. I do have some hardware lighting effects enabled.

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Replying to my own post...


After trying a few different ways of bypassing hubs, I have come to the conclusion that two things were causing trouble for me:


1. The USB-C hub doesn't seem to pass the keyboard through during POST or GRUB menu.


2. The hub in the monitor may not be connecting to the keyboard because it isn't getting a video signal from the laptop during boot. There appears to be a setting in the BIOS that lets you choose your boot display, but only the internal display is a choice there - no others - when I have it connected via the USB C hub and HDMI connection. There is a comment in there about displayport possibly being an option, but my hub only has a single HDMI output.


The monitor hub allows for two different host devices to be connected - and each can be assigned to one of several video inputs on the monitor. Since the monitor isn't active - the internal hub may be in an off state preventing the keyboard signal from passing. I am going to experiment a bit more and see if I can get this working.


I am a bit bummed out that the "one connection" option for the laptop (connectiing both video and USB with a single USB-C connection is falling flat. I probably have to connect the monitor's hub cable separately to the computer instead of passing it through the hub. There may be some better hub options out there (Thunderbolt instead of USB-C), but they will be pricey.


I did confirm that the KB does need to be in BIOS mode in order to interact with GRUB and the BIOS at POST time when I connect keyboard directly to laptop.

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