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@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@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@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@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@gmail.com wrote:
> On Fri, Apr 3, 2015 at 10:30 AM, Francis Gerund ranrund@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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