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I´ve just installed 20.04 on my laptop, replacing 19.10.

The USB installer process worked perfectly, but after rebooting, I´m getting a black screen right after the grub, with no text, and selecting recovery mode gets stuck on "loading initial ramdisk".

I have tried editing the boot parameters, removing quiet splash, and changing gfxmode $linux_gfx_mode for gfxmode text, to be able to see some kind of info at boot, but the black screen still persists.

Any suggestion?

Machine: DELL Inspiron 15 5567 AMD Radeon R7 M445 Graphics Intel i7 Processor

Dual boot Ubuntu 20.04 + Windows 10 (it was working fine with 19.10)

Bios: Uefi, security OFF.

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I had the same problem. My computer is a Dell Inspiron 15.

The problem is with UEFI. To fix it you can turn off PPT in the UEFI/BIOS options and enable Legacy Boot.

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  • Hey Victor, thank you! It was the PPT option indeed, turning it off solves the problem. Ubuntu can boot correctly now, it's a bit strange that 19.10 had no problem booting up, even with PPT turned on. – DonTropo Apr 23 '20 at 20:35
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    I'm facing the same problem but I don't find any settings for PPT in BIOS. Can you please share where is located in Dell Inspiron 15 3521? – GNB Apr 24 '20 at 18:36
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    @DonTropo same pc and same probem here, can you say to us where to find that option? – ScTALE Apr 25 '20 at 14:12
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    You can find the "PPT Security" option in the BIOS under the Security tab, you have to uncheck "PPT On". I did not have to enable the Legacy Boot in order to boot 20.04 correctly. – DonTropo Apr 26 '20 at 15:17
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    On brand new Latitude 5400, the PTT option is replaced by TPM (see dell.com/support/article/fr-fr/how12395/…). But this change nothing, and the "Legacy Boot Mode" is no longer present. See the answser of @Amias (askubuntu.com/a/1250303/706066) for the right solution. – AnTiToinE Aug 26 '20 at 10:27
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I too found the same thing on my Inspiron 5567. I had PPT on also, but could still boot any Ubuntu version before 20.04 as well. I'm wondering what's causing this.

However, I did not have to turn Legacy boot on. Just turning PPT off worked just fine.

For those who are new to the BIOS, press F2 when you see the Dell logo, go to Security -> PTT Security and uncheck PTT On. Click Apply (I would recommend choosing Save as Custom User Settings), then OK, then Exit.

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  • If this question had a bounty I'd award it to you. How did you figure that out? You have my utmost respect. – starbeamrainbowlabs Jun 10 '20 at 20:57
  • @starbeamrainbowlabs you can start a bounty on the question with "Reward existing answer". That's what I usually do :) – Matthieu Aug 20 '20 at 15:08
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I had this problem on a Dell Precision m3800. It seemed to have something to do with the boot splash screen.

I fixed it by disabling the splash. I did this by removing splash from GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and running:

sudo update-grub

to apply the change.

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  • i have not had problems with secure boot being on or off with ubuntu. – Amias Jul 30 '20 at 11:19
  • This solve the issue on a brand new Latitude 5400. Changing the TPM/PTT do nothing, and the Legacy Boot option is no longer present. So this is the right solution to apply. – AnTiToinE Aug 26 '20 at 10:24
  • I can't thank you enough Amias. I used your solution and it fixed my (very frustrating) problem. I have read other solutions and tried few but they did not work for me. Some solutions blame the AMD graphic card but I don't even have an AMD card. Thanks a bunch. – user25406 Oct 6 '20 at 18:45
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    Maybe your solution is connected with this of mine and related to UEFI, and can be applied in this full form, editing /etc/default/grub replacing GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" with GRUB_CMDLINE_LINUX_DEFAULT="dis_ucode_ldr" – FantomX1 Apr 21 at 11:57
  • Unfortunately, this did not work for me on Ubuntu 20.04 I still see the blinking cursor instead of the login screen. – HadidAli Jul 20 at 9:51

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