Xorg at 100% cpu when screen is locked (after a while)

[Roderick Johnstone]

On 05/06/15 17:26, Roderick Johnstone wrote:
> Hi
>
> I'm seeing Xorg take 100% cpu, sometimes, when the screen is locked.
> Under that condition my password doesn't unlock the screen any more.
>
> It doesn't happen immediately when the screen locks, but sometime later.
> Actually I've just turned the screen locker off to see if its going to
> happen without the screen locker on as well.
>
> I'm using the proprietary nvidia driver 304xx-304.125 so I know I
> haven't got a leg to stand on...
>
> .xsession-errors has:
> QXcbConnection: XCB error: 3 (BadWindow), sequence: 31517, resource id:
> 79691778, major code: 18 (ChangeProperty), minor code: 0
>
> and if I strace Xorg I see:
> --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL,
> si_value={int=809121587, ptr=0x54552036303a3733}} ---
> rt_sigreturn({mask=[]})                 = 77929408
> --- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL,
> si_value={int=809121587, ptr=0x54552036303a3733}} ---
> rt_sigreturn({mask=[]})                 = 77960128
>
> for ever.
>
> Anyone else on nvidia drivers see similar behaviour?
>
> Thanks
>
> Roderick Johnstone

Without the screen locker there was no 100% cpu problem.

This looked a lot like RHBZ #1193742, so I downloaded Rex's libxcb 
scratch builds from comment #11 and the problem seems to be fixed.

Rex: Are these, or packages with equivalent patches going to make it to 
the updates repo soon?

Thanks

Roderick