[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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Mark, the next step is to fully reverse commit bisect from kernel 4.2 to
4.4-rc4 in order to identify the last bad commit, followed immediately
by the first good one. Once this commit has been identified, then it may
be reviewed as a candidate for backporting into your release. Could you
please do
Also, I downgraded to 4.2.0-19-generic and the bug shows again.
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https://bugs.launchpad.net/bugs/1486896
Title:
On Lenovo Thinkpad Edge E330, the screen backlight flickers
(I just reinstalled from scratch to version 15.10 today and the kernel
version was the one I noted above)
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Title:
On Lenovo
I've tested it with v4.4-rc4-wily, and the bug does not exist, leaving
only intel_backlight with the default GRUB configuration (no extra
options except "quiet splash").
While installing the upstream kernel, though, there was a warning:
W: Possible missing firmware
Packages that I installed:
linux-image-4.4.0-040400rc4-generic_4.4.0-040400rc4.201512061930_amd64.deb
linux-headers-4.4.0-040400rc4_4.4.0-040400rc4.201512061930_all.deb
linux-headers-4.4.0-040400rc4-generic_4.4.0-040400rc4.201512061930_amd64.deb
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Mark, could you please test the latest upstream kernel available from
the very top line at the top of the page from http://kernel.ubuntu.com
/~kernel-ppa/mainline/?C=N;O=D (the release names are irrelevant for
testing, and please do not test the daily folder)? Install instructions
are available at
Mark, could you please test the latest upstream kernel available from
the very top line at the top of the page from http://kernel.ubuntu.com
/~kernel-ppa/mainline/?C=N;O=D (the release names are irrelevant for
testing, and please do not test the daily folder)? Install instructions
are available at
I just upgraded the kernel on 15.04 to the latest available in the repository.
Though when I reverted the settings to the default, the bug is still
reproducible.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Description changed:
Behavior is the same on Ubuntu 14.04
@penalvch, Sorry, I have updated my bios since then, and yes, it still
repeated.
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Title:
On Lenovo Thinkpad Edge E330, the screen
dmidecode:
H3ET75WW (1.12)
03/03/2015
(But the official utuility says that it is already the latest version)
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Mark, as per http://support.lenovo.com/us/en/products/laptops-and-
netbooks/thinkpad-edge-laptops/thinkpad-edge-e330 an update to your
computer's buggy and outdated BIOS is available (1.12). If you update to
this following https://help.ubuntu.com/community/BIOSUpdate does it
change anything?
If
I have found a normal fix/workaround for the bug, which removes the
flicker and still keeps the controls working:
Kernel parameters: "thinkpad-acpi.brightness_enable=0
acpi_backlight=vendor"
** Tags removed: bios-outdated-1.12
** Tags added: bios-out2
** Tags removed: bios-out2
** Tags added:
This bug was repeatable on other Linux distros: Fedora, etc.
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Title:
On Lenovo Thinkpad Edge E330, the screen backlight flickers
** Tags added: bios-outdated-1.12
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Title:
On Lenovo Thinkpad Edge E330, the screen backlight flickers badly.
Status in linux
Mark is this reproducible on the latest mainline kernel (4.3-rc3)?
** Tags removed: bios-outdated-1.12
** Tags added: latest-bios-1.12
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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** Tags added: bios-outdated-1.12
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Title:
On Lenovo Thinkpad Edge E330, the screen backlight flickers badly.
Status in linux
** Attachment added: fwts
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449316/+files/fwts
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Title:
** Attachment added: ssdt6.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449308/+files/ssdt6.dat
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** Attachment added: ssdt1.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449313/+files/ssdt1.dat
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** Attachment added: acpi
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449322/+files/acpi
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Title:
** Attachment added: version.log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449294/+files/version.log
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** Attachment added: ssdt3.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449311/+files/ssdt3.dat
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** Attachment added: dsdt.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449318/+files/dsdt.dat
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** Attachment added: vendorbacklight
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449306/+files/vendorbacklight
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** Attachment added: results.log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449314/+files/results.log
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** Attachment added: backlight
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449320/+files/backlight
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** Attachment added: dmidecode.log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449319/+files/dmidecode.log
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** Attachment added: ssdt5.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449309/+files/ssdt5.dat
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** Attachment added: ssdt2.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449312/+files/ssdt2.dat
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** Attachment added: acpidump.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449321/+files/acpidump.txt
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** Attachment added: dsdt.dsl
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449317/+files/dsdt.dsl
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** Attachment added: ssdt7.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449307/+files/ssdt7.dat
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** Attachment added: fwts_method
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449315/+files/fwts_method
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** Attachment added: ssdt4.dat
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449310/+files/ssdt4.dat
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** Description changed:
+ Behavior is the same on Ubuntu 14.04 -- 15.04.
+
Steps were taken according to this:
https://wiki.ubuntu.com/Kernel/Debugging/Backlight
With acpi_backlight=vendor, the flicker stops, and the brightness control
doesn't work.
- However,
- echo 8
** Description changed:
Behavior is the same on Ubuntu 14.04 -- 15.04.
Steps were taken according to this:
https://wiki.ubuntu.com/Kernel/Debugging/Backlight
With acpi_backlight=vendor, the flicker stops, and the brightness control
doesn't work.
However,
echo 8
** Attachment removed: acpidump.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449321/+files/acpidump.txt
** Attachment removed: acpi
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1486896/+attachment/4449322/+files/acpi
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Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.2 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
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