I have a P17 Gen1 and can confirm that after upgrade to BIOS N30ET45W(1.28)
backlight control (Fn+F5/Fn+F6) is working now.
tested on several OS versions, Xubuntu 21.10 and 22.04, Ubuntu 21.10
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@Aaron, @David,
It looks BIOS for P15/P17 Gen1 N30ET45W(1.28) is released to LVFS
already. R510 NV driver with this BIOS can resolve this issue.
https://fwupd.org/lvfs/devices/com.lenovo.ThinkPadN30ET.firmware
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Aaron,
I'm not sure if R510 NV driver can fix this or not. Sorry, we cannot find this
system panel combination on hand, could you help to check this on your end?
Thanks
https://www.nvidia.com/Download/driverResults.aspx/186156/en-us
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Aaron,
I'm not sure if R510 NV driver can fix this or not. Sorry, we cannot find this
system panel combination on hand, could you help to check this on your end?
Thanks
https://www.nvidia.com/Download/driverResults.aspx/186156/en-us
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Hi Mark,
The log attached is in hybrid mode.
If Descrite mode, for my experience, this only happen on 470 driver.
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https://bugs.launchpad.net/bugs/1944435
Title:
Backlight on P17 Gen
Thanks Aaron,
Customer noted that this didn't help him - but I assume the above only helps in
hybrid mode.
Customer is quite grumpy...but David is on PTO and he has the system for
reproducing so I'm just trying to manage expectations at the moment. Let me
know if there are any other
Please use "i915.enable_dpcd_backlight=0" for WA, or use 5.13.0-1012-oem
kernel instead.
I will try to fix it in hirsute kernel.
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => AaronMa (mapengyu)
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apport information
** Tags added: apport-collected focal
** Description changed:
- Updated to the Nvidia 460 driver and backlight (screen brightness) was
- not working so updated to the 470.63.01 before opening ticket as it also
- is not wortking on the P17 Gen 1 with BOE panel NE173QUM-N42.
