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I upgraded to 16.04, and now when booting with the default kernel the system freezes at the purple screen with dots after some seconds. I tried recovery mode and it also freezes after doing some work. It only boots when I try the upstart option in the advanced options.

My system is a Dell Inspiron mini 10

The last printed lines are (in recovery mode)

[ OK ] Started Braille Device Support.
       Starting Tell Plymouth To Write Out Runtime Data ....
       Starting Recovery Mode Menu....
[ OK ] Started Tell Plymouth To Write Out Runtime Data.

Then it freezes.

Zanna
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imb
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  • It seems hardware or kernel lock. I've been through it, in my case, it was due to video driver... While it's trying to boot, press Ctrl-Alt-F2 to see startup log, watch when it freezes and tell the result or post a photo of into your question – Redbob Aug 31 '17 at 12:03
  • The last printed lines are(in recovery mode) ..... [OK] Started Braille Device Support. Starting Tell Plymouth To Write Out Runtime Data .... Starting Recovery Mode Menu.... [OK] Started Tell Plymouth To Write Out Runtime Data.

    Then it freezes.

     – imb Sep 02 '17 at 07:32
  • Is NVIDIA your video driver? See that: https://askubuntu.com/questions/778193/system-hangs-on-starting-show-plymouth-boot-screen – Redbob Sep 02 '17 at 11:23
  • *-display description: VGA compatible controller product: Core Processor Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 02 width: 64 bits clock: 33MHz capabilities: vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:45 memory:fd000000-fd3fffff memory:d0000000-dfffffff ioport:1800(size=8 – imb Sep 04 '17 at 15:09
  • that is the output of the command :lshw -c video and the information of driver i915 is:modinfo i915 filename: /lib/modules/4.4.0-93-generic/kernel/drivers/gpu/drm/i915/i915.ko license: GPL and additional rights description: Intel Graphics author: Intel Corporation – imb Sep 04 '17 at 15:12
  • Look this: https://askubuntu.com/questions/767429/ubuntu-16-04-graphics-crashes-with-intel-graphics – Redbob Sep 04 '17 at 15:38
  • Another commentary: I can boot ubuntu 16.04 from an usb live normally in the TRY option. The version with booting problems is the upgrade version – imb Sep 04 '17 at 17:30
  • SOLVED: I have solved the problem!!. It is a bug: Bug 1253523 SOLVED BY Iván Jiménez 2015-11-02 23:28:31 EST This bug is caused by the file /var/lib/systemd/backlight/platform-dell-laptop:leds:dell::kbd_backlight created by (I guess) systemd-backlight@.service, because I can boot with kernel-4.2.3-200.fc22.x86_64 after I remove that file.

    As that file is re-created at shutdown, I have to mask the service systemd-backlight@leds:dell::kbd_backlight.service with:

    sudo systemctl mask systemd-backlight@leds:dell::kbd_backlight.service

    . THANKS VERY MUCH

     – imb Sep 05 '17 at 11:06

1 Answers1

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SOLVED: I have solved the problem!!. It is a bug: Bug 1253523 SOLVED BY Iván Jiménez 2015-11-02 23:28:31 EST . He wrote: This bug is caused by the file /var/lib/systemd/backlight/platform-dell-laptop:leds:dell::k‌​bd_backlight created by (I guess) systemd-backlight@.service, because I can boot with kernel-4.2.3-200.fc22.x86_64 after I remove that file. As that file is re-created at shutdown, I have to mask the service systemd-backlight@leds:dell::kbd_backlight.service with: sudo systemctl mask systemd-backlight@leds:dell::kbd_backlight.service . I followed his intructions and now it boots normally. THANKS VERY MUCH

imb
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    EDIT: He suggest adding the following kernel parameter: systemd.restore_state=0 instead of sudo systemctl mask systemd-backlight@leds:dell::kbd_backlight.service. Note , I have a 32 bits kernel. So the bug not only affects 64 bits. – imb Sep 05 '17 at 11:16