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4749
April 23rd, 2020 08:00
idrac Virtual Console + CentOS 7 kernel 4.4 = black screen
Hello
Please help me solving problems
We 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 mode
Idrac 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.org
rpm -Uvh https://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
yum --enablerepo=elrepo-kernel install -y kernel-lt
grub2-set-default 0
grub2-mkconfig -o /boot/grub2/grub.cfg
systemctl reboot
After 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 CPU
2. I try restart idrac after load OS
3. I try use VNC mode console, but there was identical problem, black screen on OS
Attention 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 R620
Operating System CentOS Linux
OS Version release 7.7.1908 (Core) Kernel 4.4.219-1.el7.elrepo.x86_64
BIOS Version 2.9.0
Firmware Version 2.65.65.65
Lifecycle Controller Firmware 2.65.65.65
Ezh494
5 Posts
1
May 18th, 2020 04:00
Yeah!
Need add command nomodeset after rhgb quite in grub config
After that all work!
Dell-DylanJ
6 Operator
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2.9K Posts
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April 23rd, 2020 13:00
Are you only having issues when using kernel 4?
Ezh494
5 Posts
0
April 23rd, 2020 14:00
Yes, i have problem only with CentOS7 kernel 4
There 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
6 Operator
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2.9K Posts
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April 30th, 2020 15:00
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
5 Posts
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May 14th, 2020 05:00
Hello
Thanks for answer
Good idea, but i don't know another video driver
Can you help me, give me link for instruction or package
Dell-DylanJ
6 Operator
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2.9K Posts
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May 14th, 2020 07:00
Unfortunately, you'll need to locate a driver on your own. There is not one that I can recommend for your configuration.
Ezh494
5 Posts
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May 14th, 2020 08:00
Hmm..maybe i found solution
Now, 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 config
After save config video in idrac console and VNC work!
I will try repeat this solution on another Dell server.
Dell-DylanJ
6 Operator
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2.9K Posts
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May 18th, 2020 08:00
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
1 Message
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June 2nd, 2021 20:00
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
Moderator
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5.4K Posts
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37 Points
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June 2nd, 2021 21:00
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.