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#1 2018-05-28 21:59:57

SilentSam
Member
Registered: 2008-02-21
Posts: 39

Flashing white screen in Konqueror and KMail

I just upgraded today and noticed this bug.

When I open kmail, the preview pane is flashing white. It's brutal enough to be seizure inducing.

The following error is shown:

Error loading text-to-speech plug-in "flite"
[0528/175408.242799:WARNING:stack_trace_posix.cc(699)] Failed to open file: /tmp/.glPQnzH1 (deleted)
  Error: No such file or directory
[3738:3738:0528/175408.364522:FATAL:zygote_main_linux.cc(534)] Check failed: sandbox::ThreadHelpers::IsSingleThreaded(). 
#0 0x7ff42d046abe <unknown>
#1 0x7ff42d0618ec <unknown>
#2 0x7ff42c0f224a <unknown>
#3 0x7ff42d007a92 <unknown>
#4 0x7ff42d00826b <unknown>
#5 0x7ff42de4ebaa <unknown>
#6 0x7ff42d006e65 <unknown>
#7 0x7ff42babb875 QtWebEngine::processMain()
#8 0x563658ebcb14 <unknown>
#9 0x7ff42a50d06b __libc_start_main
#10 0x563658ebcb9a <unknown>

Received signal 6
#0 0x7ff42d046abe <unknown>
#1 0x7ff42d046bd0 <unknown>
#2 0x7ff42d047207 <unknown>
#3 0x7ff42a5208f0 <unknown>
#4 0x7ff42a52086b __GI_raise
#5 0x7ff42a50b40e __GI_abort
#6 0x7ff42ba61934 <unknown>
#7 0x7ff42d0619cf <unknown>
#8 0x7ff42c0f224a <unknown>
#9 0x7ff42d007a92 <unknown>
#10 0x7ff42d00826b <unknown>
#11 0x7ff42de4ebaa <unknown>
#12 0x7ff42d006e65 <unknown>
#13 0x7ff42babb875 QtWebEngine::processMain()
#14 0x563658ebcb14 <unknown>
#15 0x7ff42a50d06b __libc_start_main
#16 0x563658ebcb9a <unknown>
  r8: 0000000000000000  r9: 00007ffc4902e3e0 r10: 0000000000000008 r11: 0000000000000246
 r12: 00007ffc4902e880 r13: 00007ffc4902e8a0 r14: 0000000000000079 r15: 00007ffc4902e680
  di: 0000000000000002  si: 00007ffc4902e3e0  bp: 00007ffc4902e630  bx: 0000000000000006
  dx: 0000000000000000  ax: 0000000000000000  cx: 00007ff42a52086b  sp: 00007ffc4902e3e0
  ip: 00007ff42a52086b efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000
 trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000
[end of stack trace]
Calling _exit(1). Core file will not be generated.
[3719:3754:0528/175409.508256:ERROR:service_manager_context.cc(252)] Attempting to run unsupported native service: /usr/bin/content_renderer.service
[3719:3754:0528/175409.858814:ERROR:service_manager_context.cc(252)] Attempting to run unsupported native service: /usr/bin/content_renderer.service
[3719:3754:0528/175410.447390:ERROR:service_manager_context.cc(252)] Attempting to run unsupported native service: /usr/bin/content_renderer.service
[3719:3754:0528/175410.642903:ERROR:service_manager_context.cc(252)] Attempting to run unsupported native service: /usr/bin/content_renderer.service
[3719:3754:0528/175410.845410:ERROR:service_manager_context.cc(252)] Attempting to run unsupported native service: /usr/bin/content_renderer.service

Opening Konqueror via the command kfmclient openURL %u text/html results in a similar flashing experience so I have a feeling that this may be due to the qt5-webengine package rendering incorrectly.


Packages:

pacman -Q | grep kmail
kmail 18.04.1-1
kmail-account-wizard 18.04.1-1
kmailtransport 18.04.1-1
pacman -Q | grep konqueror
konqueror 18.04.1-1
pacman -Q | grep qt5-web  
qt5-webchannel 5.11.0-1
qt5-webengine 5.11.0-2
qt5-webkit 5.212.0alpha2-15

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#2 2019-01-28 20:53:10

SilentSam
Member
Registered: 2008-02-21
Posts: 39

Re: Flashing white screen in Konqueror and KMail

It's been awhile, and after multiple upgrades I'm still experiencing this.

In konqueror, I'm able to fix this by: Tools | Configure Konqueror | General | Default web browser engine > KHTML.

So clearly something is amiss in WebEngine for this tower.

I can't switch the rendering engine for Kmail unfortunately, so this isn't a full workaround.

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#3 2019-01-28 21:40:08

seth
Member
Registered: 2012-09-03
Posts: 49,985

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#4 2019-02-05 05:02:15

SilentSam
Member
Registered: 2008-02-21
Posts: 39

Re: Flashing white screen in Konqueror and KMail

I hadn't, thanks for the link! I'll try rebuilding the package when I have time available and we'll see if that helps.

I'll report back here with my findings.

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