fonts sometimes render as black squares in applications launched from TorBrowser

[andrewdavidwong]

https://groups.google.com/d/topic/qubes-users/Yy6iX0-D7RI/discussion

More information: it seems to be limited to when the file explorer (dolphin) is started from within the privacy browser.

When I go to the same folder from a Dolphin that was started from the Qubes menu, the characters in the dialog display properly.

See: https://i.imgur.com/1ItY3jR.png

Yes, I've noticed this as well. It seems to affect at least a couple of different programs (Dolphin, Gwenview). The problem also goes away after restarting the VM.

[adrelanos]

The application in question is not been developed by Whonix. The same one is being used in any Qubes template. Could be a missing dependency?

@marmarek any idea?

[adrelanos]

The application in question is not been developed by Whonix. The same one is being used in any Qubes template. Could be a missing dependency?

@marmarek any idea?

[marmarek]

Since the same application does work when started from outside of Tor Browser, I would exclude missing dependency. Maybe some missing environment variable?

[marmarek]

Since the same application does work when started from outside of Tor Browser, I would exclude missing dependency. Maybe some missing environment variable?

[adrelanos]

Marek Marczykowski-Górecki:

Since the same application does work when started from outside of Tor Browser, I would exclude missing dependency. Maybe some missing environment variable?

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#1892 (comment)

Just now verified. Tor Browser does not flush environment variables.

"sudo -u user" cleans environment variables, but kdiaglog does not seem
to have any issues with this.

I could reproduce this issue in a Qubes Debian TemplateBased AppVM,
using Tor Browser and Dolphin.

[adrelanos]

Marek Marczykowski-Górecki:

Since the same application does work when started from outside of Tor Browser, I would exclude missing dependency. Maybe some missing environment variable?

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Reply to this email directly or view it on GitHub:
#1892 (comment)

Just now verified. Tor Browser does not flush environment variables.

"sudo -u user" cleans environment variables, but kdiaglog does not seem
to have any issues with this.

I could reproduce this issue in a Qubes Debian TemplateBased AppVM,
using Tor Browser and Dolphin.

[marmarek]

Ok, it looks to be the opposite problem: TorBrowser adds few additional environment variables which breaks kdialog:

FONTCONFIG_PATH=/home/user/tor-browser_en-US/Browser/TorBrowser/Data/fontconfig
LD_LIBRARY_PATH=/home/user/tor-browser_en-US/Browser/TorBrowser/Tor/

When added unset FONTCONFIG_PATH to /usr/lib/qubes/qvm-copy-to-vm.kde, it works. I would say it's TorBrowser bug.

[marmarek]

Ok, it looks to be the opposite problem: TorBrowser adds few additional environment variables which breaks kdialog:

FONTCONFIG_PATH=/home/user/tor-browser_en-US/Browser/TorBrowser/Data/fontconfig
LD_LIBRARY_PATH=/home/user/tor-browser_en-US/Browser/TorBrowser/Tor/

When added unset FONTCONFIG_PATH to /usr/lib/qubes/qvm-copy-to-vm.kde, it works. I would say it's TorBrowser bug.

[adrelanos]

Tor Browser breaks rendering of fonts in applications launched from Tor Browser:
https://trac.torproject.org/projects/tor/ticket/18813

[adrelanos]

Tor Browser breaks rendering of fonts in applications launched from Tor Browser:
https://trac.torproject.org/projects/tor/ticket/18813