** Tags added: cscc
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https://bugs.launchpad.net/bugs/1775065
Title:
No brightness controls and /sys/class/backlight empty after upgrade to
Bionic on laptop with GeForce
Sorry,
The grub file is:
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'
GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=10
I have bought a new laptop and downloaded the latest LTS version of
Ubuntu. When I tried to install the dual boot for the first time, it
failed, then after adding "nomodeset" to the grub menu I managed to
install the same. But after installation there is no gui brightness
control as well as the
I'm also facing same issue in Ubuntu 18.04.
Manufacturer: HP Omen
Graphics Card: Nvidia GTX 1060
Even workaround also not solving problem. Please fix this issue ASAP,
because most of them facing same issue.
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Forgot my setup infos:
##
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic
dmidecode:
System Information
Manufacturer: HP
Product Name: HP ZBook 15 G5
uname -a:
4.15.0-39-generic #42-Ubuntu
Got a similar problem on a HP Zbook G5. I have 2 graphics cards: Intel + Nvidia.
I use the Nvidia proprietary drivers 415. The difference in my case is that I
have an entry in "/sys/class/backlight", namely: "intel_backlight" and that I
can control the display brightness using the gnome GUI
I can confirm this very same problem in my laptop, which is a Thinkpad
P1 with a Xeon E-2176M and hybrid Intel / NVIDIA card working in
"Discreet" mode (that is, only the NVIDIA card is enabled) using the
proprietary NVIDIA driver installed via the nvidia-driver-390 package
(390.87-0ubuntu1).
The
Hi! I have an Omen by HP 15-ce004la with NVIDIA GTX1060 Q-MAX and the
bug is still present.
This is my setup:
Ubuntu 18.04 with kernel 4.18.13-041813-generic
I'am getting acpi errors like this one below in boot time too:
[0.104082] ACPI BIOS Error (bug): Failure creating
I have an Omen by HP 15-dc0015np. This device have the same insue but
only have a nvidia card, so doens't support to use intel video card to
fix temporaly backlight. The solution above doens't work on me and use
acpi_osi= or acpi_backlight=vendor or acpi_backlight=video or acpi_osi=!
Yes, this was after an upgrade to Ubuntu 18.04 LTS (Bionic Beaver) from
Ubuntu 17.10.1 (Artful Aardvark).
The bug is fixed in the mainline kernel; I have added the appropriate
tag and marked the bug as confirmed.
** Tags added: kernel-fixed-upstream
** Changed in: linux (Ubuntu)
Status:
Yes, this was after an upgrade to Ubuntu 18.04 LTS (Bionic Beaver) from
Ubuntu 17.10.1 (Artful Aardvark).
I will test with the latest upstream kernel.
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Did this issue start happening after an update/upgrade? Was there a
prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.17
** Attachment added: "dmidecode"
https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1775065/+attachment/5148734/+files/dmidecode
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** Attachment added: "fwts method"
https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1775065/+attachment/5148733/+files/fwts%20method
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** Attachment added: "grep -r . proc-acpi"
https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1775065/+attachment/5148730/+files/grep%20-r%20.%20proc-acpi
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** Attachment added: "dsdt.dsl"
https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1775065/+attachment/5148731/+files/dsdt.dsl
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** Attachment added: "fwts"
https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1775065/+attachment/5148732/+files/fwts
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Although step 3 at https://wiki.ubuntu.com/Kernel/Debugging/Backlight
asks for the output of ls /sys/class/backlight, it gives no output, so I
do not include an attachment. Steps 9, 10, and 12–16 either cause no
changes or do not apply. Step 11, as noted, is a workaround.
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