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GoldenMouse
Tux's lil' helper
Joined: 29 Sep 2005
Posts: 112
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 Posted: Tue Mar 27, 2007 7:48 pm Post subject: Cannot blank discs |
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| I'm trying to blank some CD-RWs, but Graveman! mysteriously fails. I tried installing GnomeBaker, but it, too fails. After launching these from the command line and watching the output, I found that for some reason, I need to be root for this operation to actually take place, which is baffling. Yet, when I attempt to run them as root, I get a failure of an entirely different stripe: Root cannot open windows when I'm logged into X as someone else. What's going on? |
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Kingmilo
Apprentice
Joined: 29 Apr 2005
Posts: 173
Location: South Africa
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| Posted: Tue Mar 27, 2007 8:12 pm Post subject: |
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I am not sure for the initial problem of not being able too blank the CD-RW.
I can help you with the X and root problem though, you need to make sure that the user you are logged into X as is part of the wheel and cdrom group 
_________________
trample the weak, hurdle the dead.. . |
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GoldenMouse
Tux's lil' helper
Joined: 29 Sep 2005
Posts: 112
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| Posted: Tue Mar 27, 2007 8:25 pm Post subject: |
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| I think I am in those groups, though I'm not sure how to verify what groups I am in. I know that I'm definitely in wheel. |
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shrimp123
Apprentice
Joined: 02 Sep 2004
Posts: 199
Location: Here!
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| Posted: Tue Mar 27, 2007 8:39 pm Post subject: |
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to check ur groups:
root cant open windows when logged as some1 else:
login, open X and some xterm
xhost + localhost
ssh -XY root@localhost
xterm <or whatever>
that is, u need to "let" some1 else open windows with xhost (care, and check man page plz). and then tell root login to use the correct display (through the -XY option). You can also use the
export DISPLAY=localhost:0.0
but be careful here, since, u need to know the exact display number u r on!
regarding helping with errors, please get the X and get us some messages and we can try.
S |
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piewie
Guru
Joined: 26 Sep 2002
Posts: 489
Location: old Europe
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| Posted: Tue Mar 27, 2007 9:06 pm Post subject: |
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blanking CD-RW media in a writer connected to the Secondary Slave IDE port
cdrecord dev=ATA:1001,1,0 blank=fast
Check:
cdrecord dev=ATA --scanbus
Last edited by piewie on Wed Mar 28, 2007 1:52 pm; edited 1 time in total |
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GoldenMouse
Tux's lil' helper
Joined: 29 Sep 2005
Posts: 112
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| Posted: Wed Mar 28, 2007 12:34 am Post subject: |
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| shrimp123 wrote: | to check ur groups:
root cant open windows when logged as some1 else:
login, open X and some xterm
xhost + localhost
ssh -XY root@localhost
xterm <or whatever>
that is, u need to "let" some1 else open windows with xhost (care, and check man page plz). and then tell root login to use the correct display (through the -XY option). You can also use the
export DISPLAY=localhost:0.0
but be careful here, since, u need to know the exact display number u r on!
regarding helping with errors, please get the X and get us some messages and we can try.
S |
I haven't tried that yet. However, one would think that there would either be a more elegant solution or that this would be default behavior. For instance, at some point in the past, I was able to open gdmsetup without any issues. I would provide my root password, then proceed to change the settings on gdm. However, that has recently changed. Now I cannot access gdmsetup short of logging into X as root.
As for the cd programs, even command line operations fail. The problem seems to hinge on the fact that the program can't get exclusive access to the cdrom. After running "groups" I have verified that I am in all of the requisite groups, perhaps even more than I should be.
| Code: | michael@melisandre ~ $ groups
adm wheel floppy audio cdrom dialout tape video usb users portage games plugdev
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shrimp123
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Joined: 02 Sep 2004
Posts: 199
Location: Here!
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| Posted: Wed Mar 28, 2007 1:00 am Post subject: |
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member of adm? umm! dunno what that means!
cd programs fail on command prompt? can you give an example and possibly the error messages? if no error shows up on the terminal, can u post the messages in
dmesg | tail
S |
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GoldenMouse
Tux's lil' helper
Joined: 29 Sep 2005
Posts: 112
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| Posted: Wed Mar 28, 2007 1:04 am Post subject: |
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| Code: | michael@melisandre ~ $ graveman
(graveman:12041): Gtk-WARNING **: Theme directory of theme ICON-Crystal-SVG-1.1.0 has no size field
umount: /dev/hdc is not in the fstab (and you are not root)
umount: /dev/hdc is not in the fstab (and you are not root)
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and
| Code: | michael@melisandre ~ $ dmesg|tail
ISO 9660 Extensions: Microsoft Joliet Level 3
ISO 9660 Extensions: RRIP_1991A
cdrom: hdc: mrw address space DMA selected
cdrom open: mrw_status 'not mrw'
ISO 9660 Extensions: Microsoft Joliet Level 3
ISO 9660 Extensions: RRIP_1991A
cdrom: hdc: mrw address space DMA selected
cdrom open: mrw_status 'not mrw'
ISO 9660 Extensions: Microsoft Joliet Level 3
ISO 9660 Extensions: RRIP_1991A
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shrimp123
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Joined: 02 Sep 2004
Posts: 199
Location: Here!
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| Posted: Wed Mar 28, 2007 1:12 am Post subject: |
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cat /etc/fstab
ls -all /dev/hdc
ls -all /dev/cdr*
ls -all /dev/dvd*
S |
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GoldenMouse
Tux's lil' helper
Joined: 29 Sep 2005
Posts: 112
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| Posted: Wed Mar 28, 2007 7:26 pm Post subject: |
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Here ya go. I'm using Gnome, so removable media are being auto-mounted by Gnome's volume manager.
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michael@melisandre ~ $ cat /etc/fstab
/dev/hda1 / ext3 defaults 0 1
/dev/hda5 none swap sw 0 0
none /proc proc defaults 0 0
none /dev/shm tmpfs defaults 0 0
podrick:/home/public/Music /home/michael/Music nfs rw 0 0
michael@melisandre ~ $ ls -all /dev/hdc
brw-rw---- 1 root cdrom 22, 0 Mar 28 14:04 /dev/hdc
michael@melisandre ~ $ ls -all /dev/cdr*
lrwxrwxrwx 1 root root 3 Mar 28 14:04 /dev/cdrom -> hdc
lrwxrwxrwx 1 root root 3 Mar 28 14:04 /dev/cdrw -> hdc
michael@melisandre ~ $ ls -all /dev/dvd*
lrwxrwxrwx 1 root root 3 Mar 28 14:04 /dev/dvd -> hdc
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shrimp123
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Joined: 02 Sep 2004
Posts: 199
Location: Here!
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| Posted: Wed Mar 28, 2007 9:22 pm Post subject: |
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here goes my guess :
graveman looks at fstab to do the mount/unmount
gnome does the auto-mount thingy (i can see that in dmesg, but, sry, i use fvwm, so dunno how that works)
when graveman tries to unmount (before a erase), its unable to "find what to do"
can you provide this info :
insert disk u want to blank (and i guess let gnome auto-mount)
df -a
launch graveman and try to erase (obviously gives error)
df -a
if u see /dev/hdc mounted, in the "df -a", then, u have caught the problem! go as root, and say
umount /dev/hdc
(basically try to erase, when disk is unmounted. you can do this by disabling the automount also, but i guess u like auto-mount)
then, try graveman
if this works, we can add an entry to fstab -or- figure out how to let gnome-graveman interact with automount.
S |
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GoldenMouse
Tux's lil' helper
Joined: 29 Sep 2005
Posts: 112
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| Posted: Wed Mar 28, 2007 9:47 pm Post subject: |
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This is after inserting the cd, but before opening graveman
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michael@melisandre ~ $ df -a
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda1 36946724 26961396 8108536 77% /
proc 0 0 0 - /proc
sysfs 0 0 0 - /sys
udev 258064 2728 255336 2% /dev
devpts 0 0 0 - /dev/pts
cachedir 36946724 26961396 8108536 77% /lib/splash/cache
none 258064 0 258064 0% /dev/shm
usbfs 0 0 0 - /proc/bus/usb
podrick:/home/public/Music
146441728 59094624 79908192 43% /home/michael/Music
/dev/hdc 51042 51042 0 100% /media/KNOPPIX
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I ran and then opened graveman to blank the disc, and graveman claims a success. I'm curious, though, as to whether this behavior is specific to my setup or if this is how burning programs normally operate across the board for different distributions.
Yeah, I like the automounting of volumes. It's one of the big reasons why I have never moved from using DEs to a more stripped down environment.
Edit: Curiously enough, I can run gdmsetup without any issues under xfce, but it still fails on gnome, for the same reason why I can't open any other windows as root. |
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shrimp123
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Joined: 02 Sep 2004
Posts: 199
Location: Here!
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| Posted: Wed Mar 28, 2007 11:18 pm Post subject: |
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alrighty we made some progress....
i think graveman just doesnt cummunicate well enuf with gnome automount.
i know we can overcome this with a line in /etc/fstab, BUT, i dont have gnome installed to check how to make it work with automount. some -guru- should be able to make ur life a little easier. just try my guess
/media/KNOPPIX /dev/hdc auto auto 0 0
<check blanking and automounting>
if that doesnot work change it to
/media/KNOPPIX /dev/hdc auto defaults 0 0
or
/media/KNOPPIX /dev/hdc auto defaults, user 0 0
these are just guesses, so, please pardon me if they dont work.
regarding y u can run gdmsetup on xfce and not on gnome is probably the DISPLAY variable or xhost. do this:
xfce
open xterm
echo $DISPLAY
gdmsetup <and quit!>
xhost -
gdmsetup <might not open!>
quit xfce
gnome
open xterm
echo $DISPLAY (if not set or not similar to above, export DISPLAY=<whatever was above, possibly :0.0 or something> )
xhost +
gdmsetup <should work!>
why are DE different? its got to do with what the developers decide as some standard variables to export. DE dont export all variables and that makes some difference.
3 steps :
1. check with graveman if it is supposed to take care of the automounting (without any line for it on /etc/fstab)
- if yes, please file a bug with their team
2. we need to know the correct line on /etc/fstab that will let automount and such programs (like blanking) to function
3. please confirm that u want to be adm group. ( i dunno what that helps/hurts, but, always helps to understand if its needed) if u r in that group just to ease system maintenance (instead of logon as root each time), please see the man page for sudo. thats less prone to damaging the system by mistake
S |
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GoldenMouse
Tux's lil' helper
Joined: 29 Sep 2005
Posts: 112
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| Posted: Sat Apr 07, 2007 4:06 pm Post subject: |
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Apologies for the long delay. I've had something of a busy week and troubleshooting was put on the back burner. I have since (for other reasons) removed gnome and am now running only XFCE. I'll take a look around and try out some things, then get back to you.
Thanks for the help thus far. |
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