Предупреждения или ошибки?
 

dmesg | grep ERROR
[ 0.886779] pci0000:00: ACPI _OSC request failed (AE_ERROR), returned control mask: 0x1d
[ 2.878872] [drm:intel_dsm_platform_mux_info] *ERROR* MUX INFO call failed
[ 2.878942] [drm:intel_dsm_platform_mux_info] *ERROR* MUX INFO call failed
[ 18.341324] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 16000000, was 12060000
[ 270.697968] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 160d0000, was 16000000
[ 484.983573] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 000d0000, was 160d0000
[ 641.691004] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 16000000, was 12060000
[ 723.752522] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 160d0000, was 16000000
[ 743.401554] [drm:gen6_sanitize_pm] *ERROR* Power management discrepancy: GEN6_RP_INTERRUPT_LIMITS expected 000d0000, was 160d0000
Это предупреждения или ошибки? На работу не влияет никак.

Это Bug #1167669.
На 13.04 с "коробочным" ядром не наблюдается (последний комментарий).

Обновите Bumblebee до последней версии.

Google перевод
Для Ubuntu даже баг завели по этому поводу:

http://osdir.com/ml/ubuntu-bugs/2013-04/msg18807.html

Можно на него подписаться:
https://bugs.launchpad.net/ubuntu/+s...+subscriptions

PS Значит два бага :)

Решение: sudo apt-get install linux-generic-lts-quantal