Description of problem: logging into XFCE DE (light DM / intel 810 or later grahpics) the video image tears for a few seconds until Mageia Welcome is populated. after this time displayed image is ok.
note: sometimes this behaviour is noticed at presentation of the login greeter,
both at boot and if logging out.
Version-Release number of selected component (if applicable):
DATE.txt: Thu Jan 3 22:20:48 CET 2019
How reproducible: every time
Steps to Reproduce:
1. install XFCE DE from above .iso onto intel 810 or later hardware. reboot and log-in
2. observe a few seconds of screen tearing
Created attachment 10644 [details]
Assigning to the registered maintainer.
Latest try, XFCE from Classic installer, Radeon video, from login to desktop.
- ex GDM: delay with grey background before correct one.
- ex LightDM: works correctly.
- ex LXDM: brief chaos then grey background before correct desktop.
- ex SDDM: same.
Still true in Classic ISO end January (calles beta2 round 2).
x64. Radeon video.
Launched Xfce from GDM, LightDM, LXDM, SDDM. Chaotic screen before desktop displays. Best under GDM: just blank grey, acceptable.
Fixed re Xfce Live ISO (after installation) for round beta2.3. Still applies briefly booting to Live mode, but this is unimportant.
If this holds true for Xfce from Classic ISO, this bug can be closed.
Valid for 7beta3?
On the riseup pad benmc says so....
*** Bug 24657 has been marked as a duplicate of this bug. ***
M7beta3, real hardware, AMD/ATI/Radeon HD7310 video
Dick has: Amdgpu Stoney Radeon R2/R3/R4/R5 graphics
Ben has: intel 810 or later grahpics
Maybe the type of video does matter after all, because for me this bug is fixed, if with the qualification that after logging in from the display manager, the brief screen messing seen previously is now replaced by a blank grey desktop for a few seconds before it becomes normal - I suspect while it is being populated.
GDM: as described - same as before, comment 3.
LightDM: even better, a normal transition; also as c3 (but not c4).
LXDM: as described.
SDDM: as described.
I think this is acceptable, unless the other two still have the messy screen; you say yes. Ben cites LightDM, Dick GDM (can you try LightDM ?).
Yet to note the Xfce Live.
Live Xfce 64 bits install from M7B3 round 3: same video corruption, although it seems less than 4 secs
Re comment 9:
> I think this is acceptable, unless the other two still have the messy
> screen; you say yes. Ben cites LightDM, Dick GDM (can you try LightDM ?).
What is the point? Classcial installer chose GDM...
Created attachment 10922 [details]
Picture of screen corruption with Radeon GPU
I used to see the tearing on machines with Intel GPU, and screen corruption on a machine with Radeon GPU and another with NVIDIA GPU (but only with the nouveau driver). With the latest Mageia-7-beta3-Live-Xfce-x86_64 ISO, I only see the screen corruption on the machine with Radeon GPU. Picture attached to show how bad it looks.
I don't know what we can do about it though.
My Radeon is equally bad ... just more colourful ;)
(In reply to Martin Whitaker from comment #11)
> I don't know what we can do about it though.
rc x86_64 has improved no end, both GDM and lightDM no longer show issue for me on HP Probook 4520s.
Will try my Portege R930, and if ok, will recommend closing this bug if others confirm issue resolved
Portege R930 no video tearing at login, single DE install / lightDM
please, all commentors check and confirm- via qa-discuss is fine if you prefer.
if no dissenters, will close after RC round 2 if still no further issues.
Unchanged: still a "bug" for me
I still get the scrambled screen for 1 to 2 seconds with both Radeon and with NVIDIA/nouveau graphics.
maybe a errata note?
(In reply to Martin Whitaker from comment #16)
> I still get the scrambled screen for 1 to 2 seconds with both Radeon and
> with NVIDIA/nouveau graphics.
Yep, I see it also. I run 8 workspaces, each with 13 second slide show
wallpaper with autostart script to jump to different workspace and start
either xterm or other applications.
The couple of seconds of video are showing different workspaces with the xterm
or application before xfce gets control to run austart scripts.
$ cat /etc/sysconfig/desktop
$ systemctl status display-manager.service | grep -E "PID|bin/"
Main PID: 917 (lightdm)
├─ 917 /usr/sbin/lightdm
$ grep '=' /home/bittwister/.dmrc
# lspcidrake | grep -i card:
Card:ATI Radeon HD 5000 to HD 6300 (radeon/fglrx): Advanced Micro Devices, Inc. [AMD/ATI]|Cedar [Radeon HD 5000/6000/7350/8350 Series] [DISPLAY_VGA]
(In reply to ben mcmonagle from comment #17)
> maybe a errata note?
I am still seeing this with Radeon HD7310 graphics.
I wonder if this is the same: In my case not tearing, but while Xfce start there is flickering between black screen and full desktop maybe five times during a couple seconds.
Using Mageia 8 beta 2 32 bit Xfce I see this on a Thinkpad T43
GPU: AMD RV370/M22 [Mobility Radeon X300]
Using: ATI Radeon HD4870 and earlier
Tried Xfce on an Aorus X5 laptop, Intel i7 plus nvidia GTX 965M.
Mageia x86_64 beta2
Classic iso with nvidia current
Classic iso with nouveau
Installation from Xfce Live with free graphics driver
Installation from Live boot menu with nvidia current
In all four cases there was no problem logging in or running the desktop. On this hardware it appears to be stable on the scale of hours, with no startup problems.
I saw now on dev list that Xfce 4.16 is released and will probably start building in cauldron testing repo later today.
I will later see if that works better :)
re comment 21:
Spoke too soon. The default dm was LightDM. With xdm the screen became garbled at login but it was momentary and did not seem to affect the rest of the session. However, faults began to appear. Windows could not be moved without leaving a trail of copies. Switching workspaces deleted the icon contents for each space without moving to that workspace. Going back to LightDM removed all the problems. Managed to save dmesg for both sessions - shall compare them to see if anything stands out.
should we still go for errata?
(In reply to Len Lawrence from comment #23)
> re comment 21:
> Spoke too soon. The default dm was LightDM. With xdm the screen became
> garbled at login but it was momentary and did not seem to affect the rest of
> the session. However, faults began to appear. Windows could not be moved
> without leaving a trail of copies. Switching workspaces deleted the icon
> contents for each space without moving to that workspace. Going back to
> LightDM removed all the problems. Managed to save dmesg for both sessions -
> shall compare them to see if anything stands out.
I assume you know to at least rm -r ~/.config/xfce4/* per the instructions
when installing/running a new release of xfce. Next login requires you
to re-enter your desktop changes.
I noticed a lot less tearing after rm -fr ~/.local/* ~/.cache/* then log out/in.
I attributed my extensive tearing to running 8 workspaces all running slideshow
wallpaper changes every 13 seconds.
(In reply to Morgan Leijström from comment #22)
> ... Xfce 4.16
> ... I will later see if that works better :)
Nope, still lots of black and white bands, flickering and such for 5-10 seconds logging into xfce on Live xfce 32 bit on my Thinkpad T43.
(In reply to Bit Twister from comment #25)
> I assume you know to at least rm -r ~/.config/xfce4/* per the instructions
> when installing/running a new release of xfce.
What instructions for this do users see?
Should it be added in https://wiki.mageia.org/en/Mageia_8_Release_Notes ?
(Apparently for this issue it seen not relevant as problem exist in fresh live too, but anyway)
(In reply to Morgan Leijström from comment #26)
> (In reply to Morgan Leijström from comment #22)
> > ... Xfce 4.16
> > ... I will later see if that works better :)
> Nope, still lots of black and white bands, flickering and such for 5-10
> seconds logging into xfce on Live xfce 32 bit on my Thinkpad T43.
Ok, then guessing it is a xorg/lightdm handshaking over what to use for a
> (In reply to Bit Twister from comment #25)
> > I assume you know to at least rm -r ~/.config/xfce4/* per the instructions
> > when installing/running a new release of xfce.
> What instructions for this do users see?
Something to effect to remove ~/.config/xfce4 and ~/.config/thundar
I have seen the message on new xfce release during updates.
> Should it be added in https://wiki.mageia.org/en/Mageia_8_Release_Notes ?
I have not figured out if this kind of thing goes into Release or Errata.
Will only affect users doing a clean install with a previous version
setup in separate /home partition.
Users doing a mga7 to 8 upgrade should the message.
> (Apparently for this issue it seen not relevant as problem exist in fresh
> live too, but anyway)
Hi, I have installed MGA8 Beta 2 and I have same problem too.
At first connection,my screen blink and is zebra.
It's seem that same problem here.
My computer has Optimus technology and I have tested some things like:
- Install Bumblebee with driver 390 -> no effect
- Deactivate graphic card with command (https://doc.fedora-fr.org/wiki/Prime#Probl.C3.A8mes_connus) -> no effect
Do I try another DM?
On same machine, Thinkpad T400 the second internal round of 8RC Live xfce have no problem at all, but after Live install of that system to another (faster) USB stick, it flickers with wide zebra bands a couple seconds at login.
Some timing issue i presume.
I believe this zebra banding is different from the bug exemplified by the attachement https://bugs.mageia.org/attachment.cgi?id=10922 - at least it looks very different.
But maybe related. Anyhow...
I now see an interesting thing: a second after login a wide band 1/3 screen height and as normal here full screen width flickered a couple times, it was full black but *also including the login dialogue* i just filled in. Like it was switching in parts of an old bitmap screen buffer.
this is valid onlly with LightDM or other DM too ?
The special effects vary from machine to machine. I have one where the display flashes, another where it shows old video memory contents (often a dislocated version of a previous desktop).
It's hard to pin down because it seems to randomly vary in duration from almost no time at all to several seconds. But I believe I have now confirmed it happens with LightDM, LXDM, SDDM, and XDM.
Now on my Thinkpad T43 i had horizontal bands of fine bitmap art in RGB black white pixel dots repeating about 1cm interval vertically, looking like some exclusive table cloth, over the whole screen except top and bottom panels.
(In reply to Martin Whitaker from comment #32)
> The special effects vary from machine to machine.
> I believe I have now confirmed
> it happens with LightDM, LXDM, SDDM, and XDM.
I too tried launching Xfce from: GDM, LightDM, LXDM, SDDM, and saw this brief psychedelic fault for each one, different but with the same colour base - a sort of desert brown/yellow.
XDM got the better of me, because it does not offer a desktop choice (or I could not find that), and it chose to start Plasma...
[Aside: curiosity led me to install our relative Rosa, Xfce edition. On first launch, it showed the same effect on a grander scale; but not subsequently].
Tried yesterday Live Xfce 64 bit RC take 5 on Dell Precision M4400:
First login was not too bad.
Then i let it reboot, and after login i was stupmed to see all apps i had up before rebooting was visible immediately after login, with same content.
Like a perfect hibernation cycle.
Two seconds later they were gone.
So the whole screen initially shown was from the previous session, still held perfectly intact in memory despite reboot.
On my computer with Optimus technology i have again the problem but, when I use mageia-prime with Nvidia card activated, there is no zebra or blinking.
If I come back in previous configuration with using Intel graphic card and Nvidia graphic card, zebra and blinking are present again.
I think it’s related to the use of graphics cards
We are nearing release. I see no choice but to put this in ERRATA. It is aesthetically displeasing; variable in its occurrence, form and duration. But for all that - harmless. And is in M7 if I remember rightly.
Is this résumé correct?
I'm agree with that.
(In reply to Lewis Smith from comment #37)
> We are nearing release. I see no choice but to put this in ERRATA. It is
> aesthetically displeasing; variable in its occurrence, form and duration.
> But for all that - harmless. And is in M7 if I remember rightly.
> Is this résumé correct?
I see Morgan has set IN_ERRATA8.
On logging in via LightDM to this Cauldron/M8 Xfce desktop - all was smooth!
not sure if this is relevant.
i586 install from CI i586 final.
I removed the panel, as a result of launchGUIs test run, so then had to reinstall the panel:
upon re-login the the issue has disappeared.
will check on other hardware
@ben, any news?
seems to have "disappeared" over time.
see if it turns up in Mga9 ;)
You are probably just lucky ;)
One user reported today
I am not running xfce at the moment.
How about others in this thread?
> How about others in this thread?
No tearing at all for the moment...
It seems to have "disappeared" over time.