** Description changed: 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 on suspension. + again when resuming from suspension. To me it happens this: - - I disable the integrated card - - Suspend - - Resume: no monitor backlight is on + - 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 + 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 + 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.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/955046 Title: Screen backlight is OFF when resuming from suspend with vgaswitcheroo controlled cards To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/955046/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
