The name is very poor, but the poulsbo driver is not a "video driver" , it is a driver for the backlight
>From the help: Symbol: STUB_POULSBO [=n] │ │ Type : tristate │ │ Prompt: Intel GMA500 Stub Driver │ │ Defined at drivers/gpu/stub/Kconfig:1 │ │ Depends on: HAS_IOMEM [=y] && PCI [=y] && NET [=y] │ │ Location: │ │ -> Device Drivers │ │ -> Graphics support │ │ Selects: BACKLIGHT_CLASS_DEVICE [=y] && VIDEO_OUTPUT_CONTROL [=m] && INPUT [=y] && ACPI So if the psb_gfx were to fail, it falls back to VESA , or fails completely (depends on the kernel), but it does not "fall back" to the poulsbo driver. The backlight works WITHOUT the poulsbo driver. well "works" with a script to manage brightness as my function keys do not always work, even with the kernel options "acpi_backlight=vendor and acpi_osi=Linux". Honestly I am not sure what the poulsbo driver is used for, AFIK it can be completely removed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/899244 Title: GMA500 psb_gfx To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/899244/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs