CentOS - Aug 2017 - xorg-x11-drv-intel CR update breaks X server for Intel HD520

Hi,

As a consequence of rolling out CR updates on Latitude E7470 (Skylake  
chipset), X would no longer start until I rolled back all of the  
xorg-\* packages. And to be more precise, looks like the culprit is  
xorg-x11-drv-intel:

https://bugzilla.redhat.com/show_bug.cgi?id=1445583

as the CR package release version matches the one mentioned in Comment  
#2, in the regression context.

I've already submitted a bug report:
https://bugs.centos.org/view.php?id=13717

so I just wanted to bring this issue to attention of anyone who's  
running this chipset/VGA.


Thanks,
Milos.

Do you use .conf file for your intel GPU? I had a conf file in
/etc/X11/xorg.conf.d for my intel GPU and X was unable to start. But when I
removed it it is able to start. Try it and let me know if it works for you
:)

On Sun, Aug 27, 2017 at 10:34 PM, milos.blazevic <milos.blazevic at
sbb.rs>
wrote:
> Hi,
>
> As a consequence of rolling out CR updates on Latitude E7470 (Skylake
> chipset), X would no longer start until I rolled back all of the xorg-\*
> packages. And to be more precise, looks like the culprit is
> xorg-x11-drv-intel:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1445583
>
> as the CR package release version matches the one mentioned in Comment #2,
> in the regression context.
>
> I've already submitted a bug report: https://bugs.centos.org/view.p
> hp?id=13717
>
> so I just wanted to bring this issue to attention of anyone who's
running
> this chipset/VGA.
>
>
> Thanks,
> Milos.
>
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> https://lists.centos.org/mailman/listinfo/centos
>

It seems that on RHEL bugzilla they resolved the issue the same way:

Nevermind - my issue appears to be due to having previously forced the
intel driver and uxa acceleration.  Removing this allowed X to start.


On Sun, Aug 27, 2017 at 11:27 PM, vychytraly . <vychytraly at gmail.com>
wrote:
> Do you use .conf file for your intel GPU? I had a conf file in
> /etc/X11/xorg.conf.d for my intel GPU and X was unable to start. But when I
> removed it it is able to start. Try it and let me know if it works for you
> :)
>
> On Sun, Aug 27, 2017 at 10:34 PM, milos.blazevic <milos.blazevic at
sbb.rs>
> wrote:
>
>> Hi,
>>
>> As a consequence of rolling out CR updates on Latitude E7470 (Skylake
>> chipset), X would no longer start until I rolled back all of the
xorg-\*
>> packages. And to be more precise, looks like the culprit is
>> xorg-x11-drv-intel:
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=1445583
>>
>> as the CR package release version matches the one mentioned in Comment
>> #2, in the regression context.
>>
>> I've already submitted a bug report: https://bugs.centos.org/view.p
>> hp?id=13717
>>
>> so I just wanted to bring this issue to attention of anyone who's
running
>> this chipset/VGA.
>>
>>
>> Thanks,
>> Milos.
>>
>> _______________________________________________
>> CentOS mailing list
>> CentOS at centos.org
>> https://lists.centos.org/mailman/listinfo/centos
>>
>
>

No, there's no conf file and there never was. I tired generating one,  
but it didn't help.

Besides, having to use xorg.conf, after X server worked without one in  
the previous release would be a step back,
and the wrong path to take. Support for Skylake graphics is clearly  
there, so this shouldn't happen.

Quoting "vychytraly ." <vychytraly at gmail.com>:
> Do you use .conf file for your intel GPU? I had a conf file in
> /etc/X11/xorg.conf.d for my intel GPU and X was unable to start. But when I
> removed it it is able to start. Try it and let me know if it works for you
> :)
>
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> https://lists.centos.org/mailman/listinfo/centos