Long Kernel Boot Segment in 18.04
I need help figuring out why the 1st "Kernel" section of boot time shown by "systemd-analyze plot" is 67 seconds long. How do I debug that part of the boot process?
I've been looking around and see a lot of posts discussing various things that either don't apply to my system or didn't make much difference.
-- apt-daily.service was running during boot so I followed instructions to create an override.conf file and removed it from the boot sequence. No real improvement, but it's not part of boot anymore.
-- I see reports about bugs in the 4.15.0-24 kernel but I run 4.15.0-43-generic.
-- I see discussions about swap partitions, but I don't have one. Posts I read say 18.04 uses swap files and they are just fine vs. having a swap partition.
-- When I run "systemd-analyze critical-chain" the first several entries (starting with "graphical.target") all end in @52.342s but I'm not sure what they mean.
-- The top several entries from "systemd-analyze blame" are
------- 31.636s for lightdm.service
------- 31.625s for plymouth-quit-wait.service
------- 14.750s for dev-sda1.device
------- 9.733s for systemd-journal-flush.service
------- and then it's keyboard, network, disks and stuff under 7 seconds each after that.
-- I like hibernation so I didn't play with the "noresume" setting in Grub.
This problem started when I decided to try 18.04 on a spare laptop. I reformatted the whole 750GB drive into one single EXT4 partition by rewriting the previous partition table. That worked fine and I installed 18.04 from a live CD.
I previously ran 16.04 and 18.04 on this same machine with no problems. The first version of 18.04 was an update from 16.04 but had functional problems. I decided to retry 18.04 as a clean install on a clean disk and that's when the speed problem started.
So, any ideas how to figure this out? I want to lend this laptop to a friend as a trial step into linux and having a long boot time like this will be a turn off for him.
boot kernel
asked Jan 19 at 3:49
user447969user447969
1313
add a comment |
I need help figuring out why the 1st "Kernel" section of boot time shown by "systemd-analyze plot" is 67 seconds long. How do I debug that part of the boot process?
I've been looking around and see a lot of posts discussing various things that either don't apply to my system or didn't make much difference.
-- apt-daily.service was running during boot so I followed instructions to create an override.conf file and removed it from the boot sequence. No real improvement, but it's not part of boot anymore.
-- I see reports about bugs in the 4.15.0-24 kernel but I run 4.15.0-43-generic.
-- I see discussions about swap partitions, but I don't have one. Posts I read say 18.04 uses swap files and they are just fine vs. having a swap partition.
-- When I run "systemd-analyze critical-chain" the first several entries (starting with "graphical.target") all end in @52.342s but I'm not sure what they mean.
-- The top several entries from "systemd-analyze blame" are
------- 31.636s for lightdm.service
------- 31.625s for plymouth-quit-wait.service
------- 14.750s for dev-sda1.device
------- 9.733s for systemd-journal-flush.service
------- and then it's keyboard, network, disks and stuff under 7 seconds each after that.
-- I like hibernation so I didn't play with the "noresume" setting in Grub.
This problem started when I decided to try 18.04 on a spare laptop. I reformatted the whole 750GB drive into one single EXT4 partition by rewriting the previous partition table. That worked fine and I installed 18.04 from a live CD.
I previously ran 16.04 and 18.04 on this same machine with no problems. The first version of 18.04 was an update from 16.04 but had functional problems. I decided to retry 18.04 as a clean install on a clean disk and that's when the speed problem started.
So, any ideas how to figure this out? I want to lend this laptop to a friend as a trial step into linux and having a long boot time like this will be a turn off for him.
boot kernel
asked Jan 19 at 3:49
user447969user447969
1313
add a comment |
I need help figuring out why the 1st "Kernel" section of boot time shown by "systemd-analyze plot" is 67 seconds long. How do I debug that part of the boot process?
I've been looking around and see a lot of posts discussing various things that either don't apply to my system or didn't make much difference.
-- apt-daily.service was running during boot so I followed instructions to create an override.conf file and removed it from the boot sequence. No real improvement, but it's not part of boot anymore.
-- I see reports about bugs in the 4.15.0-24 kernel but I run 4.15.0-43-generic.
-- I see discussions about swap partitions, but I don't have one. Posts I read say 18.04 uses swap files and they are just fine vs. having a swap partition.
-- When I run "systemd-analyze critical-chain" the first several entries (starting with "graphical.target") all end in @52.342s but I'm not sure what they mean.
-- The top several entries from "systemd-analyze blame" are
------- 31.636s for lightdm.service
------- 31.625s for plymouth-quit-wait.service
------- 14.750s for dev-sda1.device
------- 9.733s for systemd-journal-flush.service
------- and then it's keyboard, network, disks and stuff under 7 seconds each after that.
-- I like hibernation so I didn't play with the "noresume" setting in Grub.
This problem started when I decided to try 18.04 on a spare laptop. I reformatted the whole 750GB drive into one single EXT4 partition by rewriting the previous partition table. That worked fine and I installed 18.04 from a live CD.
I previously ran 16.04 and 18.04 on this same machine with no problems. The first version of 18.04 was an update from 16.04 but had functional problems. I decided to retry 18.04 as a clean install on a clean disk and that's when the speed problem started.
So, any ideas how to figure this out? I want to lend this laptop to a friend as a trial step into linux and having a long boot time like this will be a turn off for him.
boot kernel
asked Jan 19 at 3:49
user447969user447969
1313
I need help figuring out why the 1st "Kernel" section of boot time shown by "systemd-analyze plot" is 67 seconds long. How do I debug that part of the boot process?
I've been looking around and see a lot of posts discussing various things that either don't apply to my system or didn't make much difference.
-- apt-daily.service was running during boot so I followed instructions to create an override.conf file and removed it from the boot sequence. No real improvement, but it's not part of boot anymore.
-- I see reports about bugs in the 4.15.0-24 kernel but I run 4.15.0-43-generic.
-- I see discussions about swap partitions, but I don't have one. Posts I read say 18.04 uses swap files and they are just fine vs. having a swap partition.
-- When I run "systemd-analyze critical-chain" the first several entries (starting with "graphical.target") all end in @52.342s but I'm not sure what they mean.
-- The top several entries from "systemd-analyze blame" are
------- 31.636s for lightdm.service
------- 31.625s for plymouth-quit-wait.service
------- 14.750s for dev-sda1.device
------- 9.733s for systemd-journal-flush.service
------- and then it's keyboard, network, disks and stuff under 7 seconds each after that.
-- I like hibernation so I didn't play with the "noresume" setting in Grub.
This problem started when I decided to try 18.04 on a spare laptop. I reformatted the whole 750GB drive into one single EXT4 partition by rewriting the previous partition table. That worked fine and I installed 18.04 from a live CD.
I previously ran 16.04 and 18.04 on this same machine with no problems. The first version of 18.04 was an update from 16.04 but had functional problems. I decided to retry 18.04 as a clean install on a clean disk and that's when the speed problem started.
So, any ideas how to figure this out? I want to lend this laptop to a friend as a trial step into linux and having a long boot time like this will be a turn off for him.
boot kernel
boot kernel
asked Jan 19 at 3:49
user447969user447969
1313
asked Jan 19 at 3:49
user447969user447969
1313
asked Jan 19 at 3:49
user447969user447969
1313
asked Jan 19 at 3:49
user447969user447969
1313
asked Jan 19 at 3:49
user447969user447969
1313
1313
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Solved it.
My computer is a Dell Inspiron 1520 and there is a bug in the kernel that affects those laptops. It tries to start an svideo adapter, which the laptop doesn't have.
This post has the solution: Boot very slow because of drm_kms_helper errors
The solution is to disable the svideo connector using grub at boot up.
sudo nano /etc/default/grub
Add the kernel boot parameter: video=SVIDEO-1:d, so it will look like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=SVIDEO-1:d"
sudo update-grub
sudo reboot
answered Jan 20 at 3:14
user447969user447969
1313
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "89"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1111033%2flong-kernel-boot-segment-in-18-04%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Solved it.
My computer is a Dell Inspiron 1520 and there is a bug in the kernel that affects those laptops. It tries to start an svideo adapter, which the laptop doesn't have.
This post has the solution: Boot very slow because of drm_kms_helper errors
The solution is to disable the svideo connector using grub at boot up.
sudo nano /etc/default/grub
Add the kernel boot parameter: video=SVIDEO-1:d, so it will look like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=SVIDEO-1:d"
sudo update-grub
sudo reboot
answered Jan 20 at 3:14
user447969user447969
1313
add a comment |
Solved it.
My computer is a Dell Inspiron 1520 and there is a bug in the kernel that affects those laptops. It tries to start an svideo adapter, which the laptop doesn't have.
This post has the solution: Boot very slow because of drm_kms_helper errors
The solution is to disable the svideo connector using grub at boot up.
sudo nano /etc/default/grub
Add the kernel boot parameter: video=SVIDEO-1:d, so it will look like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=SVIDEO-1:d"
sudo update-grub
sudo reboot
answered Jan 20 at 3:14
user447969user447969
1313
add a comment |
Solved it.
My computer is a Dell Inspiron 1520 and there is a bug in the kernel that affects those laptops. It tries to start an svideo adapter, which the laptop doesn't have.
This post has the solution: Boot very slow because of drm_kms_helper errors
The solution is to disable the svideo connector using grub at boot up.
sudo nano /etc/default/grub
Add the kernel boot parameter: video=SVIDEO-1:d, so it will look like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=SVIDEO-1:d"
sudo update-grub
sudo reboot
answered Jan 20 at 3:14
user447969user447969
1313
Solved it.
My computer is a Dell Inspiron 1520 and there is a bug in the kernel that affects those laptops. It tries to start an svideo adapter, which the laptop doesn't have.
This post has the solution: Boot very slow because of drm_kms_helper errors
The solution is to disable the svideo connector using grub at boot up.
sudo nano /etc/default/grub
Add the kernel boot parameter: video=SVIDEO-1:d, so it will look like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=SVIDEO-1:d"
sudo update-grub
sudo reboot
answered Jan 20 at 3:14
user447969user447969
1313
answered Jan 20 at 3:14
user447969user447969
1313
answered Jan 20 at 3:14
user447969user447969
1313
answered Jan 20 at 3:14
user447969user447969
1313
1313
add a comment |
add a comment |
Thanks for contributing an answer to Ask Ubuntu!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1111033%2flong-kernel-boot-segment-in-18-04%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
