[CentOS] video problem since 2015-04-01 update

[Francis Gerund]

I spoke too soon.  Although the screen flicker has been worked around,  I
still intermittently get lots of horizontal black lines when going to
gmail.  No other
distribution shows this problem, only Centos 7, and only after the 1503
updates.



On Fri, Apr 10, 2015 at 10:09 PM, Francis Gerund <ranrund at gmail.com> wrote:

> Yes, that is very much like the problem I encountered, but in my case it
> did not need multiple monitors to happen, just one.  The config file
> suggested did seem to fix the problem, at least serving as a (hopefully)
> temporary workaround.
>
> Johnny, thanks for the pointer.  And thanks to all who replied.
>
> P.S. - the workaround seems to work  with both the latest "standard"
> Centos 7 kernel and the ML kernel from the El Repo repository.  But today's
> X11 updates (done before the config file was done) made no difference.
>
>
>
> On Tue, Apr 7, 2015 at 2:21 PM, Johnny Hughes <johnny at centos.org> wrote:
>
>> On 04/04/2015 11:24 AM, Francis Gerund wrote:
>> > Is there a way in Centos 7 to boot into an alternate video setup?
>> >
>> > Some distributions have an option to boot into something called VESA (or
>> > something similar).  Something that might not have the fanciest
>> features,
>> > but more likely to at least just work.
>> >
>> > On Fri, Apr 3, 2015 at 8:58 PM, Francis Gerund <ranrund at gmail.com>
>> wrote:
>> >
>> >> Updated the kernel as suggested to 3.19, did not solve problem.
>> >> Unbelievable!  Oh, well . . .
>> >>
>> >>
>> >> On Fri, Apr 3, 2015 at 8:13 PM, Francis Gerund <ranrund at gmail.com>
>> wrote:
>> >>
>> >>> Okay, thanks to all who took the time to reply.
>> >>>
>> >>> What a shame; I hadn't planned on spending Easter weekend learning to
>> do
>> >>> kernel upgrades, but . . .   here it goes.
>> >>>
>> >>>
>> >>>
>> >>> On Fri, Apr 3, 2015 at 5:59 PM, Ned Slider <ned at unixmail.co.uk>
>> wrote:
>> >>>
>> >>>>
>> >>>>
>> >>>> On 03/04/15 20:41, Francis Gerund wrote:
>> >>>>> Well, it could be the same, but the bug report does seem to refer to
>> >>>> the
>> >>>>> bug being in kernel series 3.18.  I am just using whatever 3.10
>> series
>> >>>>> kernel comes standard with Centos 7.x.
>> >>>>>
>> >>>>
>> >>>> Well, the CentOS kernel is a 3.10 kernel in name (or number) only.
>> Red
>> >>>> Hat backport much stuff from later kernels, and in this case that
>> >>>> includes much broken code for the Intel i915 driver. The code is
>> broken
>> >>>> from around 3.15 and still not completely fixed in the current
>> 4.0-rc6
>> >>>> code base. Updating to a newer kernel, and hence a newer i915 driver,
>> >>>> may or may not help, but it doesn't hurt to try.
>> >>>>
>> >>>>> I don't know anything about bug reports, and I an not familiar with
>> >>>>> swapping out kernels in Centos.
>> >>>>>
>> >>>>> BTW, is El Repo another name for the EPEL repository?
>> >>>>>
>> >>>>
>> >>>> No, they are two completely separate repositories:
>> >>>>
>> >>>> http://wiki.centos.org/AdditionalResources/Repositories
>> >>>>
>> >>>>>
>> >>>>>
>> >>>>> On Fri, Apr 3, 2015 at 1:07 PM, Akemi Yagi <amyagi at gmail.com>
>> wrote:
>> >>>>>
>> >>>>>> On Fri, Apr 3, 2015 at 10:30 AM, Francis Gerund <ranrund at gmail.com
>> >
>> >>>> wrote:
>> >>>>>>> Hello!
>> >>>>>>>
>> >>>>>>> No updates for days until 2015-04-01.  Then presented with huge
>> >>>> steaming
>> >>>>>>> pile of updates all at once, apparently related to Centos 7.1
>> >>>> release.
>> >>>>>>
>> >>>>>>> After reboot, there is a problem with the video.  It seems to
>> flicker
>> >>>>>> when
>> >>>>>>> the mouse pointer touches the screen edges.  Also, sometimes when
>> >>>> viewing
>> >>>>>>> pages in Firefox, the window becomes partially covered with
>> >>>> horizontal
>> >>>>>>> black lines.
>> >>>>>>>
>> >>>>>>> During reboots, before the login screen appears, there are quickly
>> >>>>>>> disappearing messages seeming to include references to "drm:9" and
>> >>>> some
>> >>>>>>> sort of "underrun".
>> >>>>>>>
>> >>>>>>> In the terminal window, I get a message:
>> >>>>>>>
>> >>>>>>> ABRT has detected 3 problem(s). For more info run: abrt-cli list
>> >>>> --since
>> >>>>>>> 1428078184
>> >>>>>>>
>> >>>>>>> When I do that, I get:
>> >>>>>>>
>> >>>>>>> id (blah, blah)
>> >>>>>>> reason:         WARNING: at
>> drivers/gpu/drm/i915/intel_display.c:869
>> >>>>>>> intel_wait_for_vblank+0x211/0x220 [i915]()
>> >>>>>>> time:             Fri 03 Apr 2015 11:41:49 AM CDT
>> >>>>>>> cmdline:        BOOT_IMAGE=/vmlinuz-3.10.0-229.1.2.el7.x86_64
>> >>>>>>> root=UUID=(blah, blah) ro vconsole.keymap=us
>> >>>>>>> vconsole.font=latarcyrheb-sun16 rhgb quiet LANG=en_US.UTF-8
>> >>>>>>> count:          1
>> >>>>>>> Directory:      /var/tmp/abrt/oops-2015-04-03-11:41:49-590-0
>> >>>>>>
>> >>>>>> Does this kernel.org bug look similar to yours?
>> >>>>>>
>> >>>>>> https://bugzilla.kernel.org/show_bug.cgi?id=86771
>> >>>>>>
>> >>>>>> I suggest you try kernel-ml from ELRepo and see if that fixes the
>> >>>> issue.
>>
>>
>> Does this look like your bug:
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=1204610
>>
>>
>>
>>
>>
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