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@xxxxxxxxxx> 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@xxxxxxxxx>
> 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@xxxxxxxxx>
> 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@xxxxxxxxxxxxxx> 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@xxxxxxxxx> wrote:
> >>>>>
> >>>>>> On Fri, Apr 3, 2015 at 10:30 AM, Francis Gerund <ranrund@xxxxxxxxx>
> >>>> 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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