Software Install?....
by EGO-II.1
I know this is going to sound crazy to the die-hard people in here, but
someone asked me.....and I was unable to provide an answer.....so here
goes: How DO you "add/Remove software in Fedora now? it would seem that
there's no way to do it unless you know the package name and do it from
the terminal?
TIA
EGO II
10 years, 4 months
How to enter system after Nvdia driver installation?
by WangWentao
Hi, all,
I got a HP env 5306tx laptop with dual GPUs, and I faild to install driver for it.
I have tried official driver, rpmfusion, bumblebee, all failed.
My dist is fc18-i386, with security boot disabled and legacy boot enabled.
What is bothering me is that nvidia driver leave the screen blackout.
When I reboot, I can dimly recognize a fedora logo in the center of screen, which is nearly blackout. So I cannot enter the system, and nothing changes after I add 3 at the end of grub command(and remove all these kernel options) or press ctrl-alt-fn.
My questions is:
* Why nvidia driver affects run level 3 and TTY?
* How to enter system and remove installed drivers?
Another non-related question is TTY is not working properly before I install nvidia driver. If I boot in runlevel3, and I enter TTY2 before login, the screen will flash between tty1 and tty2, or stick in tty2(cannot switch to other TTYs). I don't know it is a hardware problem or software problem.
Any advice will be appreciated.
10 years, 4 months
dhcp at system boot on a bridged connection takes over a minute
by Sam Varshavchik
[root@monster ~]# systemd-analyze blame
1min 20.456s network.service
…
>From watching boot messages, it appears that DHCP takes over a minute. It
doesn't fail, eventually it acquires the assigned IP address, and the server
finishes booting normally.
This started happening after I bridged eth0 in order to assign LAN IP
addresses to VMs on the server.
Interestingly enough, doing ifdown vnet0/ifup vnet0 after booting does not
experience the same delay. ifup vnet0 acquires IP from DHCP in a few seconds.
10 years, 4 months
F19: getting number of cores, cachesize, etc.
by Ranjan Maitra
Hi,
I am running the latest updated F19 and have the following code (see
below) from a GPL'ed program (not written by me) which involves getting
the number of cores and the cache size. The program compiles and runs
fine (no valgrind errors) on i686 architecture but not on the newer
x86_64. I have localized the problem to here, because if I explicitly
give the numbers by hand, there is not an issue (there are no valgrind
errors). Any suggestions as to what is going wrong and how to fix this?
Many thanks for any help and best wishes,
Ranjan
Here is the code:
#define SIZE_T int
SIZE_T get_nb_cores()
{
SIZE_T n = 0;
char line[BS];
FILE *fp;
if ((fp = fopen("/proc/cpuinfo","r")) == NULL) return (1);
while (fgets(line,BS,fp)) n += !strncmp(line,"processor",9);
return(n);
}
SIZE_T get_cache_size()
{
SIZE_T n = 512;
char line[BS],c;
FILE *fp;
if ((fp = fopen("/proc/cpuinfo","r")) == NULL) return (1);
while (fgets(line,BS,fp))
if (!strncmp(line,"cache size",10)) sscanf(line+11,"%c %
d",&c,&n); return(n*1024);
}
The valgrind errors go like this:
.....................
==17144== Warning: invalid file descriptor 1031 in syscall open()
.....................
==17144== at 0x4A06409: malloc
(in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==17144== by 0x3EBCC6C3CC: __fopen_internal
(in /usr/lib64/libc-2.17.so) ==17144== by 0x4149A5: get_nb_cores
(knnp.c:112)
.....................
==17144== at 0x4A06409: malloc
(in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so) ==17144==
by 0x3EBCC6C3CC: __fopen_internal (in /usr/lib64/libc-2.17.so)
==17144== by 0x414A20: get_cache_size (knnp.c:122)
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10 years, 4 months
how to clear YouTube ghost imagery from display without logging out
by Darlene Wallach
It seems to be happening a lot now. When I watch a YouTube video it leaves
ghost image of the YouTube screen. Is there a way to clear my display
without logging out?
Does my question make sense?
Thank you
Darlene Wallach
408.294.5781
--
equal justice under law
10 years, 4 months
rsync question -
by Bob Goodwin
Is rsync not supposed to append to the existing files or just copy over
them?
I would like to update /home/bobg/.thunderbird but the following simply
overwrites everything:
[root@box10 bobg]# rsync -avz /mnt/HOME1/bob/TBdBx07/
/home/bobg/.thunderbird/
In this case I have rsynced .thunderbird from box7 to an nfs server file
TBdBx07 and am in turn applying that to box10. I also want to do the
same with F20-Beta in Vmware Workstion which is how I got off on this ...
Do I misunderstand or am I simply doing it wrong?
Bob
--
http://www.qrz.com/db/W2BOD
Box 7 Fedora-19/64 XFCE Linux
10 years, 4 months
DNS problem -
by Bob Goodwin
Recently we have begun to have problems with our browsers stopping to
work, ask it to go to a bookmark address and nothing happens, everything
stops until an error message comes up that the address can not be found.
Thunderbird continues to receive e-mail unless I restart Thunderbird,
then it is unable to find gmail.com. The problem exists on two F-19
computers and several Apple computers on the LAN, in fact I often become
aware of the problem when someone complains that the internet connection
is down.
I can always restore normal operation by re-starting the Viasat modem, a
process that takes several minutes and is an annoyance.
I have determined that I can enter a numeric address e.g. 199.106.52.212
for viasat.com and that works as expected. At the request of viasat tech
support I tried taking the router out of the circuit and connecting
directly to the modem, that effected no change. Curiously, at the time
this this morning when the problem was manifest tech support's "computer
was down" which left me wondering if there was a correlation with my
apparent DNS problem. I was asked to call back in a few hours, I did that.
The tech support person seemed to take offense at my claiming there was
a DNS problem and went on to explain that I probably have a dhcp problem
and we need to start by "re-setting my NIC." From there on the
conversation began to deteriorate and she accused me of shouting at her,
I was able to extricate myself gracefully after that and agree that I
would call back when I had more time to devote to troubleshooting.
Am I missing some point here? Is there some connection between dhcp and
dns that I am not aware of. My dhcp server is in the router and deals
with about thirty addresses on the LAN and works faultlessly as far as I
can see.
Any thoughts appreciated,
Bob
--
http://www.qrz.com/db/W2BOD
box10 Fedora-19/64 bit Linux/XFCE
10 years, 4 months