Laptops with hybrid graphics fail to boot to X unless a BusID is specified

[Mario Limonciello]

Laptops containing hybrid graphics chipsets will fail to boot to X using any (supported) driver unless you explicitly define the BusID of the graphics adapter.

  (!!) More than one possible primary device found
  (--) PCI: (0@1:0:0) unknown vendor (0x10de) unknown chipset (0x05fd) rev 161,
Mem @ 0xc6000000/16777216, 0xa0000000/268435456, 0xc4000000/33554432, I/O @
0x00003000/128
  (--) PCI: (0@2:0:0) unknown vendor (0x10de) unknown chipset (0x06ea) rev 161,
Mem @ 0xc2000000/16777216, 0xb0000000/268435456, 0xc0000000/33554432, I/O @
0x00002000/128

and then that neither are primary,

  (II) Primary Device is:
  (EE) No devices detected.

and then fails to start:

  Fatal server error:
  no screens found

[Alberto Milone (albertomilone)]

Here's the relevant entry from the X.org man page:
 BusID "bus-id"
              This specifies the bus location of the graphics card. For
              PCI/AGP cards, the bus-id string has the form
              PCI:bus:device:function (e.g., “PCI:1:0:0” might be appropriate
              for an AGP card). This field is usually optional in single-head
              configurations when using the primary graphics card. In multi-
              head configurations, or when using a secondary graphics card in
              a single-head configuration, this entry is mandatory.

Put simply it's not a bug but the way it works. Maybe we should mark it as wishlist? (I would like this to be fixed too)

[Mario Limonciello (superm1)]

That's the thing - it's a new case that wasn't anticipated in the creation
of the X server. It's a single head configuration where both graphics cards
have access to that same head in some fashion.

On Tue, Dec 2, 2008 at 10:39, Alberto Milone <email address hidden> wrote:

> Here's the relevant entry from the X.org man page:
> BusID "bus-id"
> This specifies the bus location of the graphics card.
> For
> PCI/AGP cards, the bus-id string has the
> form
> PCI:bus:device:function (e.g., "PCI:1:0:0" might be
> appropriate
> for an AGP card). This field is usually optional in
> single-head
> configurations when using the primary graphics card. In
> multi-
> head configurations, or when using a secondary graphics card
> in
> a single-head configuration, this entry is mandatory.
>
> Put simply it's not a bug but the way it works. Maybe we should mark it
> as wishlist? (I would like this to be fixed too)
>
> --
> Laptops with hybrid graphics fail to boot to X unless a BusID is specified
> https://bugs.launchpad.net/bugs/304445
> You received this bug notification because you are a member of The Dell
> Team, which is a direct subscriber.
>

--
Mario Limonciello
<email address hidden>

[Bryce Harrington (bryce)]

[This is an automated message]

Hi superm1,

Please attach the output of `lspci -vvnn`, and attach your /var/log/Xorg.0.log file from after reproducing this issue. If you've made any customizations to your /etc/X11/xorg.conf please attach that as well.