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Unable to enter the bios or grub

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  • Unable to enter the bios or grub

    Hi, I "built" my first desktop and I'm having a strange problem.

    I can use the monitor, LG 24MP59G, but I cannot see the bios nor grub, at the start I obtain the no signal message and the monitor turn off and sometimes, just before lightdm appears and shows my user, a message about a strange unsupported resolution, 960x1080.
    The card is an MSI RX570 Armor 4GB, Tomahawk B350 the MB. With my two televisions, both LG, one HD ready, one FHD, I don't have any problem. I'm using the HDMI cable.

    I read different versions of the problem, for instance in this video for a similar monitor,, the cause is said to be the freesync.

    Any idea? I would like to understand also why if I try to enter the bios or stay on grub without see anything (i.e. just clicking the arrow down) and then connect the TV, it doesn't work, while if I connect the TV before start the system is ok? What do you think, it is a monitor problem or a GPU problem or even a MB problem or the combination? Or just my problem? ;(
    I would like to not give it* back, maybe is not so good but there are very few alternatives.
    Last edited by donbastiano; 10-16-2017, 05:33 PM.

  • #2
    try DVI or VGA connectors. Haven't found any other "cures".

    I have identical reverse issue while using HDMI cable (GRUB/BIOS visible on PC screen, but not in TV).
    Also with a Radeon card.


    • #3
      The problem is that the GPU doesn't have the VGA while the monitor doesn't have the DVI. The DP has the freesync but I don't have the cable I'm curious about how is possible to have such a problem, what could be the cause


      • #4
        VGA/DVI adapter?

        and no. No clue as to why it would happen. Annoying though.
        Last edited by aht0; 10-17-2017, 05:39 PM.


        • #5
          Well, for the moment there is a work-around, if the profile of the monitor in use has the FreeSync option ON, the problem is not present, at reboot the BIOS and GRUB are accessible. So I leave the FreeSync always ON, I don't know if there is some side effect i.e on power consumption or image quality


          • #6
            Wattmeter costs about 15-20 euros. Handy little tool.