grub installation failed on hp probook 4540s, ubuntu 19.04

[alireza alavi]

i tried installing ubuntu 19.04 on hp probook 4540s and halfway through the ubuntu wizard i got an error saying that the grub installation failed. what is the problem?
what am i doing wrong ?
please help me as soon as possible.

thank you

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: ubiquity 19.04.9
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
CasperVersion: 1.405
Date: Sun Dec 22 14:21:45 2019
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity nomodeset quiet splash ---
LiveMediaBuild: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Chris Guiver (guiverc)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.

Reading your report it appears you are mostly after support.

This bug report can be converted to a question (aimed at support); bug reports however are primarily aimed at finding problems, then fixing so subsequent users won't stumble with the same issue.

You can also find help with your problem in the support forum of your local Ubuntu community http://loco.ubuntu.com/ or asking at https://askubuntu.com or https://ubuntuforums.org, or for more support options please look at https://discourse.ubuntu.com/t/community-support/709

Also please note Ubuntu 19.04 is the 2019-April (year.month) release of Ubuntu which has a supported life of 9 months. It reaches it's EOL next month (18-Jan-2020), so you could try 19.10 and save yourself the release-upgrade step you'd have to do very soon anyway.

[Chris Guiver (guiverc)]

Thank you for reporting this bug to Ubuntu.

Ubuntu 19.04 (disco) reached end-of-life on January 23, 2020.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in.

[Launchpad Janitor (janitor)]

[Expired for grub-installer (Ubuntu) because there has been no activity for 60 days.]