idrac Virtual Console + CentOS 7 kernel 4.4 = black screen

Question

HelloPlease help me solving problemsWe have several servers Dell PowerEdge R610/620.Now, I have the task install on this servers CentOS 7 with kernel 4.4.First time i'm upgrade all firmware on last version.Second install CentOS 7 in UEFI modeIdrac virtual console worked.Then i'm upgrade kernel in CentOS 7 on 4.4 version with help this comand:rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.orgrpm -Uvh https://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpmyum --enablerepo=elrepo-kernel install -y kernel-ltgrub2-set-default 0grub2-mkconfig -o /boot/grub2/grub.cfgsystemctl rebootAfter restart virtual concole work on UEFI loading, but after select kernel 4.4 on grub virtual console have only black screen.But SSH work fine, and i can use host!Why this ?I try this:1. Disabled C1E and C state option on CPU2. I try restart idrac after load OS3. I try use VNC mode console, but there was identical problem, black screen on OSAttention on kernel 3 all work fine!I find same R610 host with CentOS 7 kernel 4, but with BIOS mode and old firmware on this hosts virtual console fine too!How fix this problem, how fix on UEFI mode ?Now i have this host with problem:PowerEdge R620Operating System CentOS LinuxOS Version release 7.7.1908 (Core) Kernel 4.4.219-1.el7.elrepo.x86_64BIOS Version 2.9.0Firmware Version 2.65.65.65Lifecycle Controller Firmware 2.65.65.65

Ezh494 · Accepted Answer

Yeah! Need add command  nomodeset after rhgb quite in grub configAfter that all work!

Dell-DylanJ · Answer

Are you only having issues when using kernel 4?

Ezh494 · Answer

Yes, i have problem only with CentOS7 kernel 4There is blackscreen only after loading OS, before idrac console is work in dell system loading and UEFI.Problem begin after pick kernel 4.4 on grub menu

Dell-DylanJ · Answer

I haven't been able to identify the change that might be responsible for this. You can quite likely get it to work, but I suspect that you'll need to try alternate video drivers.

Ezh494 · Answer

HelloThanks for answerGood idea, but i don't know  another video driverCan you help me, give me link for instruction or package

Dell-DylanJ · Answer

Unfortunately, you'll need to locate a driver on your own. There is not one that I can recommend for your configuration.

Ezh494 · Answer

Hmm..maybe i found solutionNow, i was setup new host on CentOS7 kernel 4.4 and find interesting grub settings for reset video driver settings.I change comand rhgb quiet on nomodeset in grub configAfter save config video in idrac console and VNC work!I will try repeat this solution on another Dell server.

Dell-DylanJ · Answer

Really glad you got it working! I'll have to hang onto these boot parameters, in case I see someone else with this issue.

bozek · Answer

Hello, I am trying to install Centos7 to a dell computer that I recently purchased. But when I click 'install Centos 7', screen turns into black and nothing happens. Can you please help me? I am having a trouble to understand what is wrong.

DELL-Young E · Answer

Hi, thank you for choosing Dell. Given that your idrac virtual console has no issues, you might need to change VGA mode on Cent OS.    https://dell.to/3vLDUFj

PowerEdge Hardware General

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