Hi,
Thank you for your reply!
After my research, the grubby command may only work for a few screen resolution. Based on your descriptions, your failure to use this command is related to the poor support from your driver for your graphics card. I suggest you can first try to open up a huge of resolutions for your graphics card. The article below is suitable for Centos 7:
(Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.)
Secondly, you can try some other solutions to solve your issue. Here are some methods you can try:
1)Reinstalled the system in a fresh VM, and re-applying the grubby command
2)To install xrdp and use remote desktop. See article:
https://www.itzgeek.com/how-tos/linux/centos-how-tos/install-xrdp-on-centos-7-rhel-7.html
(Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.)
More information you can find:
https://superuser.com/questions/1118192/updating-the-screen-resolution-in-centos7-in-hyper-v
(Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.)
If you still cannot maximize your resolution, I guess you may have to change your drive which can better support your graphics card. And you can ask your retailer for this information.
Thank you for your support!
Best regards
Joann
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