** No longer affects: pm-utils (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pm-utils in Ubuntu. https://bugs.launchpad.net/bugs/955046
Title: Screen backlight is OFF when resuming from suspend with vgaswitcheroo controlled cards Status in The Linux Kernel: Confirmed Status in linux package in Ubuntu: Incomplete Bug description: Using vgaswitcheroo to disable the integrate or discrete card could lead to some troubles when resuming from suspension (to RAM or disk as well). Basically, the computer monitor backlight could be not be turned on again when resuming from suspension. To me it happens this: - I disable the integrated card - Suspend - Resume: no monitor backlight is on At this point doing what mentioned below fix the issue, but it must be done by SSH or by memory :): echo DIGD > /sys/kernel/debug/vgaswitcheroo/switch echo OFF > /sys/kernel/debug/vgaswitcheroo/switch So, the easiest and clean fix should be to add a sleep.d script something like: #!/bin/sh if [ -e /sys/kernel/debug/vgaswitcheroo/switch ]; then case "$1" in hibernate|suspend) echo ON > /sys/kernel/debug/vgaswitcheroo/switch ;; thaw|resume) echo OFF > /sys/kernel/debug/vgaswitcheroo/switch ;; esac fi This would fix the issue for vgaswitcheroo users and won't touch the others. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/955046/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp