[Kernel-packages] [Bug 1782177] Re: Screen sometimes jumps to full brightness on resume from suspend
Does this issue still happen? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1782177 Title: Screen sometimes jumps to full brightness on resume from suspend Status in Linux: Won't Fix Status in linux package in Ubuntu: Incomplete Bug description: At night, I usually turn my brightness down as far as it will go using the brightness keys. This makes it dim, but visible and not off. When I walk away for a while, the screen goes to sleep, and when I come back and move the mouse, the screen jumps to full brightness, which is very unpleasant at night. Investigating, it seems that the brightness in intel_backlight is getting reset to 4437, but the one in acpi_video0 reads 0. $ for file in brightness max_brightness actual_brightness; > do > for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 4437 /sys/class/backlight/acpi_video0/brightness : 0 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 4437 /sys/class/backlight/acpi_video0/actual_brightness : 0 After I press the button to increase the brightness one notch, they are back in sync, and then I can turn it back down as well. $ for file in brightness max_brightness actual_brightness; > do >for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 53 /sys/class/backlight/acpi_video0/brightness : 1 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 53 /sys/class/backlight/acpi_video0/actual_brightness : 1 This is on a fresh install of xubuntu 18.04. Seems like a regression from 16.04, which I ran on the same laptop without this issue. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1782177/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1782177] Re: Screen sometimes jumps to full brightness on resume from suspend
** Changed in: linux Status: Incomplete => Won't Fix -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1782177 Title: Screen sometimes jumps to full brightness on resume from suspend Status in Linux: Won't Fix Status in linux package in Ubuntu: Incomplete Bug description: At night, I usually turn my brightness down as far as it will go using the brightness keys. This makes it dim, but visible and not off. When I walk away for a while, the screen goes to sleep, and when I come back and move the mouse, the screen jumps to full brightness, which is very unpleasant at night. Investigating, it seems that the brightness in intel_backlight is getting reset to 4437, but the one in acpi_video0 reads 0. $ for file in brightness max_brightness actual_brightness; > do > for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 4437 /sys/class/backlight/acpi_video0/brightness : 0 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 4437 /sys/class/backlight/acpi_video0/actual_brightness : 0 After I press the button to increase the brightness one notch, they are back in sync, and then I can turn it back down as well. $ for file in brightness max_brightness actual_brightness; > do >for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 53 /sys/class/backlight/acpi_video0/brightness : 1 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 53 /sys/class/backlight/acpi_video0/actual_brightness : 1 This is on a fresh install of xubuntu 18.04. Seems like a regression from 16.04, which I ran on the same laptop without this issue. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1782177/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1782177] Re: Screen sometimes jumps to full brightness on resume from suspend
Launchpad has imported 8 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=108703. If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. On 2018-11-10T01:18:16+00:00 Luke-schlather wrote: At night, I usually turn my brightness down as far as it will go using the brightness keys. This makes it dim, but visible and not off. When I walk away for a while, the screen goes to sleep, and when I come back and move the mouse, the screen jumps to full brightness, which is very unpleasant at night. Investigating, it seems that the brightness in intel_backlight is getting reset to 4437, but the one in acpi_video0 reads 0. This can be triggered by running xset dpms force standby. Here's the conflicting brightness values: $ for file in brightness max_brightness actual_brightness; > do > for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 4437 /sys/class/backlight/acpi_video0/brightness : 0 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 4437 /sys/class/backlight/acpi_video0/actual_brightness : 0 After I press the button to increase the brightness one notch, they are back in sync, and then I can turn it back down as well. $ for file in brightness max_brightness actual_brightness; > do > for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 53 /sys/class/backlight/acpi_video0/brightness : 1 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 53 /sys/class/backlight/acpi_video0/actual_brightness : 1 This is on a fresh install of Xubuntu 18.04 with default packages including the latest version of the i915 Intel Driver which is active. Seems like a regression from Xubuntu 16.04, which I ran on the same laptop without this issue. I initially filed this as a bug in XFCE power manager but after some troubleshooting there I can reproduce the same issue under Gnome as well. Original bug with troubleshooting: https://bugs.launchpad.net/ubuntu/+source/xfce4-power- manager/+bug/1782177 Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1782177/comments/7 On 2018-11-12T08:36:35+00:00 Lakshminarayana-vudum wrote: Luke, Can you set kernel parameters drm.debug=0x1e log_buf_len=4M and reboot the machine. Reproduce the issue and attach the dmesg log from boot. This way we know more information about the issue. BTW have you tried this issue with drm-tip? (https://cgit.freedesktop.org/drm-tip) Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1782177/comments/8 On 2018-11-13T18:51:59+00:00 Luke-schlather wrote: Created attachment 142454 DMESG output with drm.debug enabled Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1782177/comments/9 On 2018-11-14T08:01:53+00:00 Lakshminarayana-vudum wrote: Jani, any comments here? verifying with latest drm-tip will help here? Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1782177/comments/10 On 2018-11-14T08:30:47+00:00 Jani-nikula wrote: I don't think we have any fixes in drm-tip that should affect this; for that matter I don't recall changes in the area that should regress either. Backlight has been fairly solid for some years now. 1) Please paste the sysfs attributes *before* display gets disabled. 2) Is the behaviour reproducible if you don't go to minimum before disabling display? I.e. stay at the next higher level. Or, use # echo 1 > /sys/class/backlight/intel_backlight/brightness to stay above 0. We do have a check in place to crank the brightness to max if it's at the minimum upon encoder enable. However, that bit policy has been in place for ages. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1782177/comments/11 On 2018-11-14T08:31:58+00:00 Jani-nikula wrote: (In reply to Jani Nikula from comment #4) > We do have a check in place to
[Kernel-packages] [Bug 1782177] Re: Screen sometimes jumps to full brightness on resume from suspend
** Bug watch added: freedesktop.org Bugzilla #108703 https://bugs.freedesktop.org/show_bug.cgi?id=108703 ** Also affects: linux via https://bugs.freedesktop.org/show_bug.cgi?id=108703 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1782177 Title: Screen sometimes jumps to full brightness on resume from suspend Status in Linux: Unknown Status in linux package in Ubuntu: Incomplete Bug description: At night, I usually turn my brightness down as far as it will go using the brightness keys. This makes it dim, but visible and not off. When I walk away for a while, the screen goes to sleep, and when I come back and move the mouse, the screen jumps to full brightness, which is very unpleasant at night. Investigating, it seems that the brightness in intel_backlight is getting reset to 4437, but the one in acpi_video0 reads 0. $ for file in brightness max_brightness actual_brightness; > do > for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 4437 /sys/class/backlight/acpi_video0/brightness : 0 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 4437 /sys/class/backlight/acpi_video0/actual_brightness : 0 After I press the button to increase the brightness one notch, they are back in sync, and then I can turn it back down as well. $ for file in brightness max_brightness actual_brightness; > do >for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 53 /sys/class/backlight/acpi_video0/brightness : 1 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 53 /sys/class/backlight/acpi_video0/actual_brightness : 1 This is on a fresh install of xubuntu 18.04. Seems like a regression from 16.04, which I ran on the same laptop without this issue. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1782177/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1782177] Re: Screen sometimes jumps to full brightness on resume from suspend
Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem? Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.20 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 this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.20-rc2 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1782177 Title: Screen sometimes jumps to full brightness on resume from suspend Status in linux package in Ubuntu: Incomplete Bug description: At night, I usually turn my brightness down as far as it will go using the brightness keys. This makes it dim, but visible and not off. When I walk away for a while, the screen goes to sleep, and when I come back and move the mouse, the screen jumps to full brightness, which is very unpleasant at night. Investigating, it seems that the brightness in intel_backlight is getting reset to 4437, but the one in acpi_video0 reads 0. $ for file in brightness max_brightness actual_brightness; > do > for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 4437 /sys/class/backlight/acpi_video0/brightness : 0 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 4437 /sys/class/backlight/acpi_video0/actual_brightness : 0 After I press the button to increase the brightness one notch, they are back in sync, and then I can turn it back down as well. $ for file in brightness max_brightness actual_brightness; > do >for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 53 /sys/class/backlight/acpi_video0/brightness : 1 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 53 /sys/class/backlight/acpi_video0/actual_brightness : 1 This is on a fresh install of xubuntu 18.04. Seems like a regression from 16.04, which I ran on the same laptop without this issue. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1782177/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1782177] Re: Screen sometimes jumps to full brightness on resume from suspend
** Package changed: xfce4-power-manager (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1782177 Title: Screen sometimes jumps to full brightness on resume from suspend Status in linux package in Ubuntu: Incomplete Bug description: At night, I usually turn my brightness down as far as it will go using the brightness keys. This makes it dim, but visible and not off. When I walk away for a while, the screen goes to sleep, and when I come back and move the mouse, the screen jumps to full brightness, which is very unpleasant at night. Investigating, it seems that the brightness in intel_backlight is getting reset to 4437, but the one in acpi_video0 reads 0. $ for file in brightness max_brightness actual_brightness; > do > for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 4437 /sys/class/backlight/acpi_video0/brightness : 0 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 4437 /sys/class/backlight/acpi_video0/actual_brightness : 0 After I press the button to increase the brightness one notch, they are back in sync, and then I can turn it back down as well. $ for file in brightness max_brightness actual_brightness; > do >for directory in /sys/class/backlight/intel_backlight/ /sys/class/backlight/acpi_video0/ > do > echo $directory$file : $(cat $directory$file) > done > done /sys/class/backlight/intel_backlight/brightness : 53 /sys/class/backlight/acpi_video0/brightness : 1 /sys/class/backlight/intel_backlight/max_brightness : 4437 /sys/class/backlight/acpi_video0/max_brightness : 15 /sys/class/backlight/intel_backlight/actual_brightness : 53 /sys/class/backlight/acpi_video0/actual_brightness : 1 This is on a fresh install of xubuntu 18.04. Seems like a regression from 16.04, which I ran on the same laptop without this issue. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1782177/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp