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--- Comment #33 from Filip Hejsek (filip.hej...@gmail.com) ---
Forgot to mention: since your AMD GPU has number 1 (not 0), you need to replace
acpi_video0 with acpi_video1 in my workaround.
(To others: sorry for the email spam)
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--- Comment #32 from Filip Hejsek (filip.hej...@gmail.com) ---
The acpi_video error seems to be
https://github.com/systemd/systemd/issues/15329 - first the ACPI driver creates
acpi_video1 device, then amdgpu removes it in favor of amdgpu_bl1, but
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--- Comment #31 from Paulo Nascimento (paulo.ul...@googlemail.com) ---
Error messages are:
Mai 03 23:01:37 pn-legion systemd-backlight[861]: Failed to get backlight or
LED device 'backlight:acpi_video1': No such device
Mai 03 23:01:37 pn-legion
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--- Comment #30 from Paulo Nascimento (paulo.ul...@googlemail.com) ---
laptop: Lenovo Legion 5, amd ryzen 5 4600h
Graphics: Device-1: NVIDIA TU116M [GeForce GTX 1660 Ti Mobile] driver: nouveau
Device-2: Advanced Micro Devices
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Filip Hejsek (filip.hej...@gmail.com) changed:
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--- Comment #28 from Antony J.R (antonyjr...@gmail.com) ---
(In reply to Paulo Nascimento from comment #26)
> laptop: Lenovo Legion 5, amd ryzen 5 4600h
> Graphics: Device-1: NVIDIA TU116M [GeForce GTX 1660 Ti Mobile] driver:
> nouveau
>
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--- Comment #27 from kurmi...@libero.it ---
For me the only workaround to avoid this bug is disabling systemd backlight
restoration. Then use brillo and enable a specific service to restore the
brightness at startup.
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--- Comment #26 from Paulo Nascimento (paulo.ul...@googlemail.com) ---
laptop: Lenovo Legion 5, amd ryzen 5 4600h
Graphics: Device-1: NVIDIA TU116M [GeForce GTX 1660 Ti Mobile] driver: nouveau
Device-2: Advanced Micro Devices
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--- Comment #25 from m11.1l1@gmail.com ---
I found another workaround and it's easier than EVER and it's done via
mkinitcpio
First, what's mkinitcpio(https://wiki.archlinux.org/index.php/Mkinitcpio)?
The initial ramdisk is in essence a
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--- Comment #24 from m11.1l1@gmail.com ---
Related to the previous post:
https://www.linux.org/threads/failed-to-start-load-save-screen-backlight-brightness-of-amdgpu_bl1.31998/#post-113058
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--- Comment #22 from Antony J.R (antonyjr...@gmail.com) ---
A workaround for this is done by the OpenSUSE folks, Please see
https://bugzilla.opensuse.org/show_bug.cgi?id=1180749
The only distro which fixes this is OpenSUSE. This is because there
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Paulo Nascimento (paulo.ul...@googlemail.com) changed:
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--- Comment #19
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Germán Ríos González (german.rios.gonza...@gmail.com) changed:
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--- Comment #17 from John Shand (jshand2...@gmail.com) ---
Created attachment 292419
--> https://bugzilla.kernel.org/attachment.cgi?id=292419=edit
Journalctl 8-9-2020
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--- Comment #16 from John Shand (jshand2...@gmail.com) ---
Created attachment 292417
--> https://bugzilla.kernel.org/attachment.cgi?id=292417=edit
Dmesg 8-9-2020
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--- Comment #14 from Xia Mu (mu.xia...@gmail.com) ---
The bug should be fixed in 5.9.0-0.rc3. I tested it on my laptop with AMD Ryzen
7 PRO 4750U CPU with Renoir GPU.
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--- Comment #11 from Alexander Monakov (amona...@gmail.com) ---
v2 patch:
https://lore.kernel.org/lkml/20200804201313.6464-1-amona...@ispras.ru/
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--- Comment #10 from Alexander Monakov (amona...@gmail.com) ---
Proposed patch:
https://lore.kernel.org/lkml/20200803200218.2167-1-amona...@ispras.ru/
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Kunal Bhat (kunal.bhat2...@gmail.com) changed:
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--- Comment #7 from Sandor Ecker (esa...@freemail.hu) ---
I have upgraded to 5.6.rc1:
uname -a
Linux Aspire-A315-41 5.6.0-050600rc1-generic #202002092032 SMP Mon Feb 10
01:36:50 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
I have seen that the code
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--- Comment #6 from Sandor Ecker (esa...@freemail.hu) ---
So it seems that the 16 bit actual_brightness is not a bug, but a feature... :)
https://bugzilla.kernel.org/show_bug.cgi?id=203905
--- Comment #5 from Sandor Ecker (esa...@freemail.hu) ---
Would it be possible to set max_brightness to 2^16-1 ?
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--- Comment #3 from Lukáš Krejčí (lskre...@gmail.com) ---
Commit 262485a50fd4 ("drm/amd/display: Expand dc to use 16.16 bit backlight")
changed the value that is returned for `actual_brightness`:
-static unsigned int
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--- Comment #2 from Bjoern Franke (b...@nord-west.org) ---
Created attachment 283299
--> https://bugzilla.kernel.org/attachment.cgi?id=283299=edit
dmesg
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--- Comment #1 from Michel Dänzer (mic...@daenzer.net) ---
Please attach the output of dmesg.
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