[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
** Tags added: ubuntu-certified ** Tags added: cscc -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
This possibly means brightness value is 0 when systemd- backlight@amdgpu_bl0 saves the brightness, and it clamps its value to 5% of max_brightness which is 12. Needs to perform a kernel bisection to find the fix commit. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
Installed the 19.04 daily image, the kernel is 4.18.0-11-generic. It works fine. And the brightness value is 255. $ cat /sys/class/backlight/amdgpu_bl0/brightness 255 $ cat /sys/class/backlight/amdgpu_bl0/actual_brightness 255 $ cat /sys/class/backlight/amdgpu_bl0/max_brightness 255 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
After you install the 18.04 image, it will show the dim screen. After suspend, the backlight is normal. $ cat /var/lib/systemd/backlight/* 12 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
When this issue happens, what's the output of "grep . /var/lib/systemd/backlight/*"? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
After I resume from suspend, I found the backlight is normal, and here is the log. ** Attachment added: "a285.journal.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+attachment/5221571/+files/a285.journal.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
backlight_level =
amdgpu_atombios_encoder_get_backlight_level_from_reg(adev);
dig = amdgpu_encoder->enc_priv;
dig->bl_dev = bd;
bd->props.brightness =
amdgpu_atombios_encoder_get_backlight_brightness(bd);
bd->props.power = FB_BLANK_UNBLANK;
backlight_update_status(bd);
DRM_INFO("amdgpu atom DIG backlight initialized\n");
u8
amdgpu_atombios_encoder_get_backlight_level_from_reg(struct amdgpu_device *adev)
{
u8 backlight_level;
u32 bios_2_scratch;
bios_2_scratch = RREG32(mmBIOS_SCRATCH_2);
backlight_level = ((bios_2_scratch & ATOM_S2_CURRENT_BL_LEVEL_MASK) >>
ATOM_S2_CURRENT_BL_LEVEL_SHIFT);
return backlight_level;
}
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Title:
Dim screen after first boot on Thinkpad A285
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[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
So it looks like the initial brightness is got from atombios of graphic card, so it is atombios issue or the code can't correctly parse the atombios. it is highly possible that this is an atombios issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
No, I didn't, let me try it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
Do you also see the issue on 19.04 daily image? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
Upgraded to 4.15.0-42 kernel from proposed. And this issue is still exist. And the default value is 12, but the max is 255. $ cat /sys/class/backlight/amdgpu_bl0/brightness 12 $ cat /sys/class/backlight/amdgpu_bl0/max_brightness 255 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
Does this issue still happen after applying the latest updates? Would it be possible for you to test the proposed kernel and post back if it resolves this bug? See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance! ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
apport information ** Tags added: apport-collected bionic ** Description changed: - We installed the 18.04 daily image on ThinkPad A285, found the screen is - dim at the first boot. + We installed the 18.04 daily image on ThinkPad A285, found the screen is dim at the first boot. + --- + ProblemType: Bug + ApportVersion: 2.20.9-0ubuntu7.4 + Architecture: amd64 + AudioDevicesInUse: + USERPID ACCESS COMMAND + /dev/snd/controlC1: u 1481 F pulseaudio + /dev/snd/controlC0: u 1481 F pulseaudio + CurrentDesktop: ubuntu:GNOME + DistroRelease: Ubuntu 18.04 + InstallationDate: Installed on 2018-11-12 (0 days ago) + InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) + MachineType: LENOVO 20MWZ47RUS + Package: linux (not installed) + ProcFB: 0 amdgpudrmfb + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-38-generic root=UUID=347498ab-8eae-42d3-a1e3-74e9be6b6ba3 ro quiet splash vt.handoff=1 + ProcVersionSignature: Ubuntu 4.15.0-38.41-generic 4.15.18 + RelatedPackageVersions: + linux-restricted-modules-4.15.0-38-generic N/A + linux-backports-modules-4.15.0-38-generic N/A + linux-firmware 1.173.1 + Tags: bionic + Uname: Linux 4.15.0-38-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo + _MarkForUpload: True + dmi.bios.date: 09/21/2018 + dmi.bios.vendor: LENOVO + dmi.bios.version: R0XET30W (1.07 ) + dmi.board.asset.tag: Not Available + dmi.board.name: 20MWZ47RUS + dmi.board.vendor: LENOVO + dmi.board.version: SDK0J40697 WIN + dmi.chassis.asset.tag: No Asset Information + dmi.chassis.type: 10 + dmi.chassis.vendor: LENOVO + dmi.chassis.version: None + dmi.modalias: dmi:bvnLENOVO:bvrR0XET30W(1.07):bd09/21/2018:svnLENOVO:pn20MWZ47RUS:pvrThinkPadA285:rvnLENOVO:rn20MWZ47RUS:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: + dmi.product.family: ThinkPad A285 + dmi.product.name: 20MWZ47RUS + dmi.product.version: ThinkPad A285 + dmi.sys.vendor: LENOVO ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1802834/+attachment/5211665/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1802834] Re: Dim screen after first boot on Thinkpad A285
Here is the journalctl log. ** Attachment added: "journalctl.backlight.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+attachment/5211664/+files/journalctl.backlight.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
