Red Hat Bugzilla – Bug 1012230
No back light on boot
Last modified: 2014-03-11 09:29:38 EDT
Description of problem:
No back light on boot, LCD working (viewing with a torch), works on shut down, shows the following with back light:
[0.641359] EFI: problem loading in-kernel x.509 certificate (-129)
[0.642175] couldn't get size: 0x800000000000000e
[1.466445] usb 2-4: string descriptor 0 malformed (err=-61), defaulting to 0x0409
[1654.906316] mei_me 0000:00:.0:stop
[1654.907938] reboot:Power down
it then hangs and does not power down.
Version-Release number of selected component (if applicable):
new install Fedora 19 with all updates.
Steps to Reproduce:
Additional info: Acer Aspire V5-573 4GB ram i5 Haswell graphics
dual boot Windows 8
installation looks fine
Brightness control default 0
on every boot
The no power off on Acer laptops seems pretty common. trying the different
available reboot= kernel parameters is worth exploring although it
does not always work on Acer laptopts.
The brigthness control stuff for Intel is being tracked here:
Thank you Michele, I live with the shutdown problem,
I boot into a KDE desktop and that bypassed the brightness
on boot problem.
the shutdown Acer issue might be solved in 3.12.6 due to the following patch:
Author: Khalid Aziz <email@example.com>
Date: Wed Nov 27 15:19:25 2013 -0700
PCI: Disable Bus Master only on kexec reboot
commit 4fc9bbf98fd66f879e628d8537ba7c240be2b58e upstream.
You can find a build for F19 here:
If you could try it and let me know if the Acer shutdown issue is gone or not
that'd be great.
I copied all the files to their locations,
changed grub, but it would not boot, it started but
I have attached the message from var log, I hope it helps.
Created attachment 842249 [details]
var log message
the Acer shutdown issues has been confirmed to be fixed in 3.12.6 in multiple
If the issue you see is the graphical login not coming up I believe you are
seeing BZ https://bugzilla.redhat.com/show_bug.cgi?id=1046426
the problem with loading 3.12.6 is no boot/initramfs
I am trying to work out how to get it, it did not come with
Thank you for your help, it makes a difference
ah I think I've seen at least one report where the initramfs did not get
generated. It is created in the %post section of the kernel package.
You can manually create it via: dracut /boot/initramfs-3.12.6-300.fc20.x86_64.img 3.12.6-300.fc20.x86_64
(Adjust version to the exact one you are using)
Let me know how it works out.
I could not find the %post section.
I ran dracut with my version and got
W: /lib/modules/3.12.6-200.fc19.x86_64//modules.dep is missing. Did you run depmod?
I ran depmod, but got the same error when I ran dracut again.
We may cut our loses and upgrade to 20, what do you think ?,
although I haven't had much luck with upgrades, and I'm living with
usually there is no need to look at or fiddle with the post section of an rpm.
Although you can take a look at it with 'rpm -q --scripts kernel' if you're
I think it might be best to wait for the 3.12.6 to hit the standard update
repos for F19 and see if it fixes the issue for you. It is currently in updates testing. I tend to prefer tackling one issue at the time. It might very
well be that with F20 we get other issues and then we're worse off than now ;)
I hope that once it makes the updates repositories, a simple 'yum update'
will help you get the new kernel on the box.
It did an update to 3.12.6 and the shut down problem
is no more, however on boot it usually hangs at the
network manager, ctrl alt del restart and it works.
I will live with it.
Thank you for your help.
*********** MASS BUG UPDATE **************
We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 19 kernel bugs.
Fedora 19 has now been rebased to 3.13.5-100.fc19. Please test this kernel update and let us know if you issue has been resolved or if it is still present with the newer kernel.
If you experience different issues, please open a new bug report for those.
(In reply to Justin M. Forbes from comment #14)
> *********** MASS BUG UPDATE **************
> We apologize for the inconvenience. There is a large number of bugs to go
> through and several of them have gone stale. Due to this, we are doing a
> mass bug update across all of the Fedora 19 kernel bugs.
> Fedora 19 has now been rebased to 3.13.5-100.fc19. Please test this kernel
> update and let us know if you issue has been resolved or if it is still
> present with the newer kernel.
> If you experience different issues, please open a new bug report for those.
I changed to KDE and solved the backlight problem.
You can close the bug as far as I am concerned.