[Bug 1891032] Re: Brightness key freeze screen

2020-10-25 Thread Launchpad Bug Tracker
[Expired for linux (Ubuntu) because there has been no activity for 60 days.] ** Changed in: linux (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891032 T

[Bug 1891032] Re: Brightness key freeze screen

2020-08-26 Thread Alex Hung
You can use the GUI app "keyboard shortcuts" to setup custom keys, or you can manually modify hwdb files (ex. /lib/udev/hwdb.d/60-keyboard.hwdb). The following tutorials may provide some help. == Modify keymap == * cd /lib/udev/hwdb.d/ * edit keymap file (60-keyboard.hwdb) * add a change, ex K

[Bug 1891032] Re: Brightness key freeze screen

2020-08-26 Thread Luciano Hanna El Adji
I can control the brightness (with step up or down) using these commands: gdbus call --session --dest org.gnome.SettingsDaemon.Power --object-path /org/gnome/SettingsDaemon/Power --method org.gnome.SettingsDaemon.Power.Screen.StepUp gdbus call --session --dest org.gnome.SettingsDaemon.Power --obj

[Bug 1891032] Re: Brightness key freeze screen

2020-08-26 Thread Luciano Hanna El Adji
This command don't cause screen freeze: echo 500 > /sys/class/backlight/intel_backlight/brightness -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891032 Title: Brightness key freeze screen To mana

[Bug 1891032] Re: Brightness key freeze screen

2020-08-26 Thread Luciano Hanna El Adji
These 3 cause screen freeze 1. sudo acpidbg -b "e EV5 1 0" ("2 0" for brightness down) 2. sudo acpidbg -b "e \_SB.PCI0.GFX0.BRT6 1 0" ("2 0" for brightness down) 3. sudo acpidbg -b "notify \_SB.PCI0.GFX0.LCD 0x86" (0x86 for brightness down) And these 2 don't work (tee: /sys/class/backlight/intel_

[Bug 1891032] Re: Brightness key freeze screen

2020-08-24 Thread Alex Hung
0. install acpidbg - sudo apt install linux-tools-`uname -r` linux- tools-generic trigger and check which of the following cause screen freeze 1. sudo acpidbg -b "e EV5 1 0" ("2 0" for brightness down) 2. sudo acpidbg -b "e \_SB.PCI0.GFX0.BRT6 1 0" ("2 0" for brightness down) 3. sudo acpidbg -b "

[Bug 1891032] Re: Brightness key freeze screen

2020-08-24 Thread Alex Hung
please refer to https://wiki.archlinux.org/index.php/backlight for more info on /sys/class/backlight/ interfaces -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891032 Title: Brightness key freeze sc

[Bug 1891032] Re: Brightness key freeze screen

2020-08-24 Thread Alex Hung
The flow of brightness hotkey is as follows key pressed -> ec triggers events -> bios/os performs a series of following functions -> ... -> ACPI EV5 -> ACPI BRT6 -> ACPI Notify LCD 0x86/0x87 -> ACPI VGA driver generates keycodes -> userspace write to /sys/class/backlight/intel_backlight/brightness

[Bug 1891032] Re: Brightness key freeze screen

2020-08-12 Thread Luciano Hanna El Adji
$ ls /sys/class/backlight/ intel_backlight ** Attachment added: "acpi.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1891032/+attachment/5401244/+files/acpi.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://b

[Bug 1891032] Re: Brightness key freeze screen

2020-08-12 Thread Alex Hung
This can be related to BIOS or to kernel driver. Could you please run "ls /sys/class/backlight/" for backlight sysfs, and attach output of "sudo acpidump > acpi.log" for BIOS analysis. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. h

[Bug 1891032] Re: Brightness key freeze screen

2020-08-12 Thread Luciano Hanna El Adji
I tried apt upgrade and bios update but didn't helped $ cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-5.4.0-42-generic root=UUID=c78b51e8-c664-4dd2-8020-7bc5da6f2bc0 ro quiet splash vt.handoff=7 ** Attachment added: "dmesg.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1891032/+att

[Bug 1891032] Re: Brightness key freeze screen

2020-08-12 Thread Kai-Heng Feng
Can you please attach dmesg after the "freeze"? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891032 Title: Brightness key freeze screen To manage notifications about this bug go to: https://bugs.

[Bug 1891032] Re: Brightness key freeze screen

2020-08-11 Thread Luciano Hanna El Adji
I removed "acpi_backlight=vendor" and didn't helped... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891032 Title: Brightness key freeze screen To manage notifications about this bug go to: https:

[Bug 1891032] Re: Brightness key freeze screen

2020-08-10 Thread Kai-Heng Feng
Please remove kernel parameter "acpi_backlight=vendor" and see if it helps. ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891032

[Bug 1891032] Re: Brightness key freeze screen

2020-08-10 Thread Kai-Heng Feng
** Package changed: systemd (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891032 Title: Brightness key freeze screen To manage notifications about this bug go to: https: