A family user of Lubuntu 18.04 has twice experienced a problem while using Thunderbird where, while dragging an email from the inbox to a local folder, if they mistakenly touch the panel with the cursor, it freezes the entire desktop. They didn't even drop the email on the panel, just touched it.
I confirmed this problem in a virtual clone of their system.
REISUB didn't seem to work. I can ssh in and restart the computer or kill Thunderbird to recover ops.
It only happens if the cursor touches the area of the panel to the left of the rightmost red marker. If it touches the running Thunderbird icon or anything to the right of it, it is OK.
When it first happened, the friendly family IT guy (me) gave counseling "don't do that" but now it's happened again.
I'd like some protection against this happening again if possible or at least a single-user recovery method.
Addition: same problem happens on an 18.04 Ubuntu system with LXDE installed. So looks like a Thunderbird / lxpanel interaction problem.
lxpanel
(my 2c anyway). I don't use thunderbird, so added it to a Lubuntu 18.04 LTS and added a RSS feed (didn't want to setup mail), dragging a news.item around I was able to have the inputs (mouse & keyboard) freeze. My display kept updating (I hadtop
in a window) and mouse moved over screen (though it remained in the display as if still dragging my news item around). The chances of a bug being fixed isn't great, but I'd still recommend filing (I didn't see any)lxpanel
, it continues to operate normally, even if it helped trigger the issue.. the killing of thunderbird fixing would be seen as reason to say wrongly filed... interaction between then causes a deadlock/hang.. and like @KGIII I don't see any stand out clues...gkrellm
andconky
displays showing behind the window kept updating. I agree the odds of getting anything fixed are slim, if LXDE had a future (sob) I might have pursued it. It doesn't happen in Ubuntu MATE which will likely be our next desktop. At least my family member can get out of the situation now without having to call me.