Red Hat Bugzilla – Bug 577413
spurious characters at top of keyboard type dialog
Last modified: 2013-01-10 00:48:22 EST
Created attachment 402959 [details]
screenshot showing spurious characters
Description of problem:
Spurious characters are displayed at the top of the keyboard type dialog when booted from the net installer image on a USB stick.
They are "^H^B". Screenshot attached.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.Install net installer image on USB stick.
$ sudo livecd-iso-to-disk --reset-mbr --format Fedora-13-Beta-x86_64-netinst.iso /dev/sdc1
2. Boot from USB stick.
3. Press enter until the keyboard type menu is displayed.
Spurious characters, "^H^B", are displayed.
Spurious characters are not displayed.
Yeah this has been there basically forever on ppc64. You're just seeing it now because of the switch to kernel modesetting that puts this code in front of everyone. Any clever ideas are welcome. No one here knows where it's coming from.
(In reply to comment #1)
> Yeah this has been there basically forever on ppc64. You're just seeing it now
> because of the switch to kernel modesetting that puts this code in front of
> everyone. Any clever ideas are welcome. No one here knows where it's coming
You gave me the idea to try some experiments:
1. In basic graphics mode they do not appear.
2. Switching between languages changes what characters are displayed, although the right-most character is always in the same position. Sometimes more than four characters are displayed.
3. Transitioning from the language menu (in English) to the keyboard menu results in a subtle change in the layout of the text (seems to be slightly different spacing).
I didn't realize that the welcome string is translated ...
This looks like a possible problem.
/* clear out top line */
buf = alloca(80);
for (i=0; i < 80; i++)
buf[i] = ' ';
/* buf is not NULL-terminated at this point. */
newtDrawRootText(0, 0, buf);
Created attachment 403003 [details]
C program to reproduce this bug
When I run this test program in a gnome-terminal window, I get a spurious '-' character at the end of the line. Putting a null character at the end of buf eliminates the spurious character.
$ gcc newt-test-1.c -lnewt
That is a very good catch!
This should be fixed in the next anaconda release.
Already included in rawhide as 3381091352c01713e7cc553447c975b727f87893.
(In reply to comment #7)
> Already included in rawhide as 3381091352c01713e7cc553447c975b727f87893.
I can't see any reason this is marked as an F13Blocker, it's an entirely cosmetic bug. Is there a reason?
Fedora Bugzappers volunteer triage team
I see this bug in F13 TC1, but as I stated it seems to be entirely cosmetic, and I'm having trouble considering it serious / blatant enough to be a blocker. James, Jesse, opinions?
Fedora Bugzappers volunteer triage team
I'm not aware of a release that hasn't had these spurious characters. I'd love to squash them once and for all, but this doesn't seem enough to warrant blocking the release in my opinion.
There is no evidence that this bug causes a problem beyond random characters being displayed.
However, the final release is supposed to be "polished":
"Provide a polished final release suitable for meeting the needs of our Target Audience"
From a software engineering POV, this bug is caused by invalid data being passed to a library. That entails a risk of its own.
the polish requirement is open to interpretation, but the specific criteria for now don't interpret it in a way that would cover this case. I think we can demote this from being a blocker...
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