I am running xemacs on Fedora 11. Normally typing C-M-/ (Ctrl-Alt-slash) will
complete the word at point. After a recent 'yum upgrade' this no longer works.
I typed 'C-h k C-M-/' on the keyboard to see what keystroke xemacs thinks it
is getting, and it reports C-M-_. In other words Ctrl-Alt-slash has somehow
Similarly, C-/ is getting through to xemacs as BS (backspace).
I can reproduce this at the local text console, so it can't be X11 related.
It might be related to the packaging of xemacs-21.5.29, but I had previously
backported 21.5.29 from Fedora 12 (by rebuilding the SRPM) and did not see this
problem. Then it started happening after a 'yum upgrade', which upgraded various
things but not my home-built xemacs package. So I think it might be a change
somewhere else which has broken xemacs's ability to recognize C-/ and C-M-/.
I use a UK layout keyboard. Other characters on the keyboard such as @ and "
work fine, so I don't think it is because the keyboard layout info has been lost.
Thanks for the report, Ed. I'm going to need some help from you, because I cannot reproduce this. I use a US layout keyboard, which may be significant.
Today's a US holiday and my wife is about to drag me off for some family fun, so I won't look at this until tomorrow. However, I will find where the keys are decoded, and probably ask you to do a few tests for me so we can determine where the problem lies.
One thing you can do right away: does "xemacs -vanilla" show the same behavior?
Yes, xemacs -vanilla produces the same behaviour.
If I can get hold of a US keyboard I will test with that.
Does xev report Control_L, Alt_L, and slash KeyPress and KeyRelease events when you press C-M-/?
I'm going to try walking you up the stack of layers that read and process key events, until we find the one where the behavior of your system deviates from mine. I hope this isn't too tedious for you, but since I can't reproduce, I don't know how else to debug it. Although I suppose I could try to make a user account with a UK locale in a VM....
I made a user account with a UK keyboard in a Rawhide VM, but I still can't reproduce, which suggests that you are right about the UK keyboard not being significant.
Are you doing anything with xmodmap, xkeycaps, etc.?
This is reproducible at the local console so it can't be anything to do with xmodmap, xkeycaps, or any other X11 settings. For the same reason I think xev is not relevant?
I will, however, try to reproduce it on a different machine.
Sorry, this fell off my radar. Do you happen to have the xemacs-aplus-fsf package installed? If not, I've fixed a bunch of other bugs in XEmacs since you first reported this bug. It might be worth trying the latest build to see if the bug is still present:
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