[Maverick] [PATCH 0/4] KMS Disablement for i8xx

Christopher James Halse Rogers christopher.halse.rogers at canonical.com
Thu Sep 2 23:52:55 UTC 2010


On Thu, 2010-09-02 at 14:25 -0400, Steven wrote:
> Dear Kernel Team,
> 
> 
> Please do NOT reapply these patches. UMS causes the majority of 8xx
> cards to boot to a black screen on Lucid and forward. I spent at least
> a month fixing probably a hundred different peoples' install problems
> after Lucid was released because of these patches.
> 

The situation in Maverick is different.  In Lucid, we had the 2.9.1
Intel X driver, which still had a UMS codepath.  In Maverick, we have
2.12, which does not have any UMS code.  The Intel driver in Maverick
will not load without KMS.

Disabling KMS on these cards in Lucid resulted in them using the UMS
codepaths of the Intel X driver, and in many cases failing.

Disabling KMS on these cards in Maverick will result in them using the
VESA X driver, which has been reported to work on the various i8xx bugs.

> 
> If you do decide to reapply these, PLEASE consider paying especially
> close attention to bugs related to this change, at the very least.
> 

I will.
> 
> I realize support on i8xx is difficult, but please be aware that these
> patches caused more harm than good for the Lucid release. Thank you
> for your time.
> 
> 
> -Stenten
> 
> 
> On Tue, Aug 31, 2010 at 1:27 PM, Tim Gardner
> <tim.gardner at canonical.com> wrote:
>         On 08/31/2010 10:13 AM, leann.ogasawara at canonical.com wrote:
>         > In Lucid, we were carrying the following 4 patches to
>         disable KMS for a
>         > known set of broken devices, specifically some i8xx chipsets
>         [1].  We
>         > purposely didn't carry these SAUCE patches forward to
>         Maverick in hopes
>         > that this would no longer be an issue.  Unfortunately, this
>         does not
>         > appear to be the case.  I'll be re-applying the following 4
>         patches to
>         > Maverick.
>         >
>         > Thanks,
>         > Leann
>         >
>         > [1] https://wiki.ubuntu.com/X/Bugs/Lucidi8xxFreezes
>         >
>         > Andy Whitcroft (4):
>         >    UBUNTU: SAUCE: i915 KMS -- support disabling KMS for
>         known broken
>         >      devices
>         >    UBUNTU: SAUCE: i915 KMS -- blacklist i830
>         >    UBUNTU: SAUCE: i915 KMS -- blacklist i845g
>         >    UBUNTU: SAUCE: i915 KMS -- blacklist i855
>         >
>         >   drivers/gpu/drm/i915/i915_drv.c |   16 ++++++++++++++++
>         >   1 files changed, 16 insertions(+), 0 deletions(-)
>         >
>         >
>         
>         
>         Acked-by: Tim Gardner <tim.gardner at canonical.com>
>         
>         --
>         Tim Gardner tim.gardner at canonical.com
>         
>         
>         --
>         kernel-team mailing list
>         kernel-team at lists.ubuntu.com
>         https://lists.ubuntu.com/mailman/listinfo/kernel-team
>         
> 
> 


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 490 bytes
Desc: This is a digitally signed message part
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20100903/cc5cafea/attachment.sig>


More information about the kernel-team mailing list