** Changed in: hwe-next
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1934557
Title:
Backlight (screen brightness) on Lenovo P14s AMD Gen2
** Changed in: linux-oem-5.10 (Ubuntu)
Status: New => Invalid
** Changed in: linux-oem-5.13 (Ubuntu)
Status: New => Invalid
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This bug was fixed in the package linux-oem-5.13 - 5.13.0-1014.18
---
linux-oem-5.13 (5.13.0-1014.18) focal; urgency=medium
* focal/linux-oem-5.13: 5.13.0-1014.18 -proposed tracker (LP:
#1944429)
* CVE-2021-40490
- ext4: fix race writing to an inline_data file while its
This bug was fixed in the package linux - 5.13.0-16.16
---
linux (5.13.0-16.16) impish; urgency=medium
* impish/linux: 5.13.0-16.16 -proposed tracker (LP: #1942611)
* Miscellaneous Ubuntu changes
- [Config] update toolchain in configs
* Miscellaneous upstream changes
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
focal' to 'verification-done-focal'. If the problem still exists, change
the tag
This bug was fixed in the package linux - 5.11.0-34.36
---
linux (5.11.0-34.36) hirsute; urgency=medium
* hirsute/linux: 5.11.0-34.36 -proposed tracker (LP: #1941766)
* Server boot failure after adding checks for ACPI IRQ override (LP: #1941657)
- Revert "ACPI: resources:
Verified on 5.11.0-33 kernel, backlight can be changed.
** Tags removed: verification-needed-hirsute
** Tags added: verification-done-hirsute
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I no longer have access to the hardware. So, I - the original reporter -
cannot verify the fix.
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https://bugs.launchpad.net/bugs/1934557
Title:
Backlight (screen
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
hirsute' to 'verification-done-hirsute'. If the problem still exists,
change the tag
** Changed in: linux-oem-5.13 (Ubuntu Focal)
Status: New => Fix Committed
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Title:
Backlight (screen brightness) on
This bug was fixed in the package linux-oem-5.10 - 5.10.0-1044.46
---
linux-oem-5.10 (5.10.0-1044.46) focal; urgency=medium
* focal/linux-oem-5.10: 5.10.0-1044.46 -proposed tracker (LP:
#1939533)
* mute/micmute LEDs no function on HP ProBook 650 G8 (LP: #1939473)
- SAUCE:
** Changed in: linux (Ubuntu Hirsute)
Status: New => Fix Committed
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Title:
Backlight (screen brightness) on Lenovo
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Status: New => Fix Committed
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Title:
Backlight (screen brightness) on
https://lists.ubuntu.com/archives/kernel-team/2021-July/122863.html
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Title:
Backlight (screen brightness) on Lenovo P14s
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Impish)
Importance: Undecided
Assignee: AaronMa (mapengyu)
Status: Confirmed
**
** Description changed:
Backlight does not change. Neither with the keys, nor with the slider.
Values in /sys/class/backlight/amdgpu_bl0/brightness do change. However
without effect on the actual brightness of the screen, which seems to be
stuck at maximum brightness.
Following the
Can confirm the workaround does the job, thanks!
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Title:
Backlight (screen brightness) on Lenovo P14s AMD Gen2 inop
Status in
Please pass kernel parameter "amdgpu.backlight=0" for workaround.
Kernel bug is already filed, and maintainer is notified:
https://bugzilla.kernel.org/show_bug.cgi?id=213715
** Bug watch added: Linux Kernel Bug Tracker #213715
https://bugzilla.kernel.org/show_bug.cgi?id=213715
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You
Hi! Do you need some extra information from me? I also have the P14s
Gen2 with a 4K screen.
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Title:
Backlight (screen brightness)
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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Hi Aaron, attaching the edid file.
** Attachment added: "p14s2a.edid"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1934557/+attachment/5509079/+files/p14s2a.edid
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Hi Simon:
You got this laptop a bit earlier.
This issue is in progress.
Also could you upload the panel EDID?
$ sudo apt install read-edid
$ sudo get-edid > p14s2a.edid
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => AaronMa (mapengyu)
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** Attachment added: "lsmod | grep thinkpad_acpi"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1934557/+attachment/5508789/+files/lsmod%20%7C%20grep%20thinkpad_acpi
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