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Subject: bug#68390: Emacs display rendering problem
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 Content preview:  Issue: Emacs display is very buggy and unusable after latest
    Fedora 38 software updates. Laptop:OS: Fedora 38 (patches updated as of 1/10/2024)cpu:
    Intel(R) =?UTF-8?Q?Core=E2=84=A2?= i7-2670QM CPU @ 2.20GHz Emacs: GNU [...] 

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Issue: Emacs display is very buggy and unusable after latest Fedora 38 soft=
ware updates.
Laptop:OS: Fedora 38 (patches updated as of 1/10/2024)cpu: Intel(R) Core=E2=
=84=A2 i7-2670QM CPU @ 2.20GHz
Emacs: GNU Emacs 28.3 (build 1, x86_64-redhat-linux-gnu, GTK+ Version 3.24.=
38, cairo version 1.17.8) of 2023-09-23

On my laptop, updated fedora version 38 with latest patches andgetting very=
 buggy behavior display rendering.
I am seeing these issues in my emacs editing sessions. Not sure ifthey happ=
en outside of emacs just yet.Btw, I am using the emacs version that came wi=
th Fedora 38, as Iusually do.
While editing buffers in emacs, the display is not updating properly.The po=
int/cursor in multiple locations of the buffer as opposed to justone.Scroll=
ing in a buffer displays remnant text that should have scrolledby on previo=
us lines no longer on the screen.
Moving the point(cursor in a buffer), can make the display to go crazyand d=
isplay the checker board pattern in the entire emacs window!In addition, th=
is checkerboard pattern remains on the entire emacs window for a few second=
s!
PS: I have only seen this behavior in my emacs session as of thismorning wh=
en I updated fedora with its regular updates for version 38.I did not upgra=
de to Fedora 39 just yet.
Also, I have been using Fedora and emacs combo on this same laptop since Fe=
dora single digit version and never seen this problem before.
Thanks,

-S

|  | Virus-free.www.avg.com |

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<html><head></head><body><div class=3D"ydpc859edeayahoo-style-wrap" style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px=
;"><div dir=3D"ltr" data-setdir=3D"false"><div>Issue: Emacs display is very=
 buggy and unusable after latest Fedora 38 software updates.</div><div><br>=
</div><div>Laptop:</div><div>OS: Fedora 38 (patches updated as of 1/10/2024=
)</div><div>cpu: Intel(R) Core=E2=84=A2 i7-2670QM CPU @ 2.20GHz</div><div><=
br></div><div>Emacs: GNU Emacs 28.3 (build 1, x86_64-redhat-linux-gnu, GTK+=
 Version 3.24.38, cairo version 1.17.8) of 2023-09-23</div><div><br></div><=
div><br></div><div>On my laptop, updated fedora version 38 with latest patc=
hes and</div><div>getting very buggy behavior display rendering.</div><div>=
<br></div><div>I am seeing these issues in my emacs editing sessions. Not s=
ure if</div><div>they happen outside of emacs just yet.</div><div>Btw, I am=
 using the emacs version that came with Fedora 38, as I</div><div>usually d=
o.</div><div><br></div><div>While editing buffers in emacs, the display is =
not updating properly.</div><div>The point/cursor in multiple locations of =
the buffer as opposed to just</div><div>one.</div><div>Scrolling in a buffe=
r displays remnant text that should have scrolled</div><div>by on previous =
lines no longer on the screen.</div><div><br></div><div>Moving the point(cu=
rsor in a buffer), can make the display to go crazy</div><div>and display t=
he checker board pattern in the entire emacs window!</div><div dir=3D"ltr" =
data-setdir=3D"false">In addition, this checkerboard pattern remains on the=
 entire emacs window for a few seconds!</div><div><br></div><div>PS: I have=
 only seen this behavior in my emacs session as of this</div><div>morning w=
hen I updated fedora with its regular updates for version 38.</div><div>I d=
id not upgrade to Fedora 39 just yet.</div><div><br></div><div>Also, I have=
 been using Fedora and emacs combo on this same laptop since Fedora single =
digit version and never seen this problem before.</div><div><br></div><div>=
Thanks,</div><div><br></div><div><br></div></div><div dir=3D"ltr" data-setd=
ir=3D"false">-S</div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div =
class=3D"ydpc859edeasignature"><div><br><br></div></div></div><div id=3D"DA=
B4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br><table style=3D"border-top: 1px sol=
id #D3D4DE;"><tr><td style=3D"width: 55px; padding-top: 13px;"><a href=3D"h=
ttp://www.avg.com/email-signature?utm_medium=3Demail&utm_source=3Dlink&utm_=
campaign=3Dsig-email&utm_content=3Dwebmail" target=3D"_blank"><img src=3D"h=
ttps://s-install.avcdn.net/ipm/preview/icons/icon-envelope-tick-green-avg-v=
1.png" alt=3D"" width=3D"46" height=3D"29" style=3D"width: 46px; height: 29=
px;"></a></td><td style=3D"width: 470px; padding-top: 12px; color: #41424e;=
 font-size: 13px; font-family: Arial, Helvetica, sans-serif; line-height: 1=
8px;">Virus-free.<a href=3D"http://www.avg.com/email-signature?utm_medium=
=3Demail&utm_source=3Dlink&utm_campaign=3Dsig-email&utm_content=3Dwebmail" =
target=3D"_blank" style=3D"color: #4453ea;">www.avg.com</a></td></tr></tabl=
e><a href=3D"#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width=3D"1" height=3D"1=
"></a></div></body></html>
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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Sunil Matta <mattasunil@HIDDEN>
Subject: bug#68390: Acknowledgement (Emacs display rendering problem)
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Date: Thu, 11 Jan 2024 17:57:02 +0000

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Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#68390: Emacs display rendering problem
Resent-From: Eli Zaretskii <eliz@HIDDEN>
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To: Sunil Matta <mattasunil@HIDDEN>
Cc: 68390 <at> debbugs.gnu.org
Date: Thu, 11 Jan 2024 21:14:48 +0200
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From: Eli Zaretskii <eliz@HIDDEN>
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 (bug-gnu-emacs@HIDDEN)
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> Date: Thu, 11 Jan 2024 17:50:10 +0000 (UTC)
> From:  Sunil Matta via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>
> 
> Issue: Emacs display is very buggy and unusable after latest Fedora 38 software updates.
> 
> Laptop:
> OS: Fedora 38 (patches updated as of 1/10/2024)
> cpu: Intel(R) Core™ i7-2670QM CPU @ 2.20GHz
> 
> Emacs: GNU Emacs 28.3 (build 1, x86_64-redhat-linux-gnu, GTK+ Version 3.24.38, cairo version
> 1.17.8) of 2023-09-23
> 
> On my laptop, updated fedora version 38 with latest patches and
> getting very buggy behavior display rendering.

Is this on text-mode frames or on GUI frames?

> I am seeing these issues in my emacs editing sessions. Not sure if
> they happen outside of emacs just yet.
> Btw, I am using the emacs version that came with Fedora 38, as I
> usually do.
> 
> While editing buffers in emacs, the display is not updating properly.
> The point/cursor in multiple locations of the buffer as opposed to just
> one.
> Scrolling in a buffer displays remnant text that should have scrolled
> by on previous lines no longer on the screen.
> 
> Moving the point(cursor in a buffer), can make the display to go crazy
> and display the checker board pattern in the entire emacs window!
> In addition, this checkerboard pattern remains on the entire emacs window for a few seconds!
> 
> PS: I have only seen this behavior in my emacs session as of this
> morning when I updated fedora with its regular updates for version 38.
> I did not upgrade to Fedora 39 just yet.

This is almost certainly not a problem with Emacs, but with your video
drivers and X libraries.  If you have some "optimization" features in
your display driver settings, try disabling them and see if the
problems go away.

Thanks.

Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#68390: Emacs display rendering problem
Resent-From: Eli Zaretskii <eliz@HIDDEN>
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To: Sunil Matta <mattasunil@HIDDEN>
Cc: 68390 <at> debbugs.gnu.org
Date: Sat, 13 Jan 2024 08:38:29 +0200
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From: Eli Zaretskii <eliz@HIDDEN>
In-Reply-To: <408200594.693789.1705098219733@HIDDEN> (message from
 Sunil Matta on Fri, 12 Jan 2024 22:23:39 +0000 (UTC))
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[Please use Reply All to reply, to keep the bug tracker CC'ed.]

> Date: Fri, 12 Jan 2024 22:23:39 +0000 (UTC)
> From: Sunil Matta <mattasunil@HIDDEN>
> 
> On Thursday, January 11, 2024 at 02:15:31 PM EST, Eli Zaretskii <eliz@HIDDEN> wrote: 
> 
> > Date: Thu, 11 Jan 2024 17:50:10 +0000 (UTC)
> > From:  Sunil Matta via "Bug reports for GNU Emacs,
> >  the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>
> > 
> > Issue: Emacs display is very buggy and unusable after latest Fedora 38 software updates.
> > 
> > Laptop:
> > OS: Fedora 38 (patches updated as of 1/10/2024)
> > cpu: Intel(R) Core™ i7-2670QM CPU @ 2.20GHz
> > 
> > Emacs: GNU Emacs 28.3 (build 1, x86_64-redhat-linux-gnu, GTK+ Version 3.24.38, cairo version
> > 1.17.8) of 2023-09-23
> > 
> > On my laptop, updated fedora version 38 with latest patches and
> > getting very buggy behavior display rendering.
> 
> Is this on text-mode frames or on GUI frames?
> 
> This is in gui frames mode. I didnt realize that there was a text mode.
> I am running emacs in server mode and window-system == 'x'
> 
> > I am seeing these issues in my emacs editing sessions. Not sure if
> > they happen outside of emacs just yet.
> > Btw, I am using the emacs version that came with Fedora 38, as I
> > usually do.
> > 
> > While editing buffers in emacs, the display is not updating properly.
> > The point/cursor in multiple locations of the buffer as opposed to just
> > one.
> > Scrolling in a buffer displays remnant text that should have scrolled
> > by on previous lines no longer on the screen.
> > 
> > Moving the point(cursor in a buffer), can make the display to go crazy
> > and display the checker board pattern in the entire emacs window!
> > In addition, this checkerboard pattern remains on the entire emacs window for a few seconds!
> > 
> > PS: I have only seen this behavior in my emacs session as of this
> > morning when I updated fedora with its regular updates for version 38.
> > I did not upgrade to Fedora 39 just yet.
> 
> This is almost certainly not a problem with Emacs, but with your video
> drivers and X libraries.  If you have some "optimization" features in
> your display driver settings, try disabling them and see if the
> problems go away.
> 
> Yes, it shouldnt be an emacs problem. I too feel its a display driver issue, but I'm only having this
> problem
> in emacs and not in other apps. 
> I do not have any optimizations set for my display and gnome window manager.
> 
> Seems like an interaction with the display driver and the latest Fedora 38 patch.
> I have posted to the fedora users group as well. No answers on that forum I'm guessing cause its only
> happening in emacs.
> 
> Very odd. I have never seen this behavior in emacs before.
> 
> And really making my emacs unusable and killing my development time, so any suggestions would
> be appreciated.
> 
> Thanks.
> 
> Sunil

I think we should wait for Fedora to resolve this.

Last modified: Sat, 20 Jan 2024 12:30:02 UTC

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