Help with debugging a bug in Konqueror

[Juraj Oravec]

Hello,

I can confirm that the issue (Falkon or Konqueror freezing the whole 
desktop when playing with <select> boxes) appears to be fixed with mesa 
version "26.1.5-1".

Best regards,
Juraj

On utorok 14. júla 2026 9:25:45 stredoeurópsky letný čas Juraj Oravec 
wrote:
> On utorok 14. júla 2026 9:15:27 stredoeurópsky letný čas Stefano
> Crocco
> wrote:
> > On lunedì 13 luglio 2026 23:46:33 Ora legale dell’Europa centrale
> > Juraj Oravec
> > 
> > wrote:
> > > A small update,
> > > 
> > > I can get both Falkon and Konqueror stuck when opening the
> > > combobox
> > > on this page:
> > > https://google.github.io/liquidfun/
> > > 
> > > Best regards,
> > > Juraj
> > > 
> > > On pondelok 13. júla 2026 23:22:46 stredoeurópsky letný čas Juraj
> > > Oravec>
> > > 
> > > wrote:
> > > > Hello,
> > > > 
> > > > > Hello to everyone,
> > > > > for the last few weeks, I've randomly encountered what I
> > > > > assume
> > > > > is a
> > > > > bug in Konqueror: I'd like to fix it, because it's rather
> > > > > annoying,
> > > > > but I don't know how to debug it to find its cause.
> > > > > 
> > > > > The issue is that sometimes Konqueror completely freezes: none
> > > > > of
> > > > > its
> > > > > windows respond to mouse or keyboard. The only way to go on is
> > > > > to
> > > > > kill it. It's not a frequent issue: it usually happens once a
> > > > > day or
> > > > > so. Once it has happened, however, it's likely to happen again
> > > > > in a
> > > > > short time.
> > > > 
> > > > I run experiencing similar issue with Falkon, where Falkon
> > > > freezes
> > > > the whole desktop when I try to open a combobox (<select>) on a
> > > > website. It also happens randomly and everything is fine after I
> > > > ssh into the machine and kill Falkon. I did not look into
> > > > debugging this issue yet as I attributed it to "has to be
> > > > external thing".
> > > > 
> > > > I am running i3 + picom on top of XOrg. If you are running
> > > > something
> > > > else, it could explain the difference on what freezes. After
> > > > Falkon
> > > > dies system is fully responsive again.
> > > > 
> > > > I attributed it to Qt or Intel drivers (I have Intel B580 gpu),
> > > > as
> > > > they are not perfect yet (the HW video acceleration likes to
> > > > crash
> > > > once in a while).
> > 
> > Thanks for this information. I tried the link you provided and
> > indeed, I got a freeze. However, as you said, this freezes the
> > whole desktop, while in the other cases (luckily) I always
> > experienced a freeze of Konqueror only. The two backtraces look
> > very similar, however, except for the beginning. I attach the
> > relative backtrace.
> > 
> > Do you get the freeze every time on the page you mentioned? I only
> > got it on my desktop machine, which is also the machine where I got
> > the other freezes. When I tried with my laptop, the page worked
> > correctly (I'm not using the laptop much these days so I can't say
> > whether Konqueror freezes on it too).
> 
> The freeze happens "always" and at "random".
> In the handful of times I tried it, I always managed to get the
> freeze, but in order to get the freeze I tried to change the running
> animation through the select box multiple times. It took variable
> number of attempts to get the freeze.
> 
> > My desktop system as ha AMD Radeon RX 6700 XT graphic card: I've had
> > it for several years and it has always worked flawlessly, so I think
> > that if the cause is related to the driver, it's something new.
> 
> Than, I would scratch that the specific GPU is an issue.
> 
> > Given that Falkon is also showing this issue, I think the cause is
> > not Konqueror itself but something else. I think I've found out
> > when this issue started happening for me: between the last days of
> > May and the first days of June. As soon as I have time, I'll try to
> > look at the log of the packages I updated in those days to see  if
> > there's something which could be related to this.
> > 
> > Stefano
> 
> Thank you for looking into this,
> Best regards, Juraj.
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