IMac Freezes on users choice screen after a few seconds...

Hello all,
Does anyone have a solution for this problem :
There are 3 users on my IMac 2 Ghz intel 20"...
Once the users choice screen appears, the whole computer freezes after a few seconds !
If I'm fast, i have time to choose a user, it starts to boot and freezes...
anyone ?

Have been having this problem for a couple of weeks on numerous channels. Switch to another channel, screen goes to black. Check to make sure it is not a video source issue. No. Check another channel: it is black too but there is the channel DVR titling on the screen. So the TV is not dead -- the DVR must be not working. I would like a new DVR or please, Verizon, respond to your customers before they switch back to the other vendors!

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IMac freezes when changing the screen saver

Hi all:
I originally posted this in the "Using Mac OS X" forum (iMac freezes when changing the screen saver, but thought I'd post here as well since the issue arises on a freshly installed OS.
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Cheers,
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> Satellite A100-590 PSAA9E freezes on Toshiba welcome screen after BIOS update
What to say Marc. It looks like you have used a wrong BIOS version or you have updated the BIOS in wrong way.
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Possibly the guys will try to flash the BIOS again with other special version.
Good luck
Greetings

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SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
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Turn on the computer.
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Video freezes after a few seconds

This is actually a continuation of a post I made almost a year and a half ago, trying to get video chat going so my mom can visit with her grandkids. The thread has been archived, so I can't post there but in case it helps here's the address:
http://discussions.apple.com/thread.jspa?threadID=1658017&tstart=0
We are both running Tiger 10.4.11 and iChat AV 3.1.9 (v446), although she's on a 1.25 GHz G4 with 1.5 GB of RAM, and I'm on a 1.8 GHz iMac G5 with 1 GB of RAM. We both have the exact same videocamera, Canon Elura 70, attached via Firewire. Both computers recognize the cameras fine, no problems there.
Anyway, my sister and I have tried 1,000 different things but nothing works. I can always see her but not hear her, and the connection is dropped after a few seconds, saying there's insufficient bandwidth to maintain the conference. She can't see me at all, but she can hear me. The chat usually ends with error -20 and sometimes -22. For instance, here's the log from our try today:
*2010-01-29 11:49:30 -0600: No data has been received for the last 10 seconds.*
*Audio channel info: local machine using 10.0.1.3:16386, expecting remote machine to send to 97.83.147.78:56754*
*Video channel info: local machine using 10.0.1.3:16384, expecting remote machine to send to 97.83.147.78:56752*
*Chat ended with error -20*
*Chat ended with error -20*
*Chat ended with error -22*
*Chat ended with error -22*
The thing is, we can video conference successfully (video and audio) with each other from separate rooms if we're both at her house, as well as from separate rooms when we're both at mine. However, when we're each at our own home, it won't work. She's got a download speed of 8.5, and mine is 8.3. Her upload speed is 1.01 and mine is 1.74.
I am connected through a router - SMC Barricade (SMC7004VBR), and a WebStar modem. We've both taken the tape out of our camera, set our bandwidth limit in iChat to none. System Preferences > Quicktime > Streaming is at 1.5Mbps. I've learned how to access my router settings but I don't see a DoS or SPI setting. It shows firewall features are disabled.
We've also tried to connect with Skype instead, and I was able to see my sister without it freezing. But she couldn't see me, so it still didn't fully work.
I'm totally at a loss. Any ideas?
Edit: Forgot to say her modem is an Ambit U10C018.
Message was edited by: laburke

Wow, thank you so much for the detailed response. I'm actually feeling a little bit of hope that we might get this figured out eventually!
iChat 3.x at both ends.
Can Login and show Buddy Lists
Can Send Visible Invites.
Can Start Video Chat but something says the Bandwidth is then not good enough.
Error Message.
All true, except she has never been able to see me unless we're both in the same my house.
The Intranet /LAN setting in Tiger for iChat 3 also returns Odd figures to
iChat so we have long said set it to 1.5Mbps which your last post says it is.
I take it you must have restarted iChat f not the Mac(s) since you changed
this setting ? (Just covering all bases)
Right.
Have you changed the range the SMC uses to miss the range the modem is using ?
The only change I've made to anything recently is in iChat prefs: Under Accounts - Server settings, I changed the top port to 443 because regular iChat kept disconnecting at odd times and I read somewhere that it might help. But we had this AV problem long before that, and after.
I see the SMC cannot Forward enough ports for iChat but Can do UPnP
(Universal Plug and Play)
Is it set to do UPnP ?
I don't see anything that says UPnP. It says:
GATEWAY
IP Address: 192.168.2.1
Subnet Mask: 255.255.255.0
DHCP Server: Enabled
Firewall: Disabled
On the Port Forward site there are two WebSTARs listed under
Scientic Atlanta
DO you have either of these ?
No, it is a DPC2100.
I could also do with seeing an old log of an Error 20 log.
They are stored in You Home Folder/Library/Logs/iChatConnectionErrors
Can you post the bits down and only down to the line that starts "Binary Images for iChat"
Pasted at bottom of this post.
Can you tell me if there is a Wifi and Ethernet connection to the Router ? (at > the same time )
My husband's PC is connected to the router via Ethernet. The only other things connected to it are the modem and my Airport Express so I can get online with my Macs. (I used to have the iMac connected by Ethernet before I realized I had an Airport card. Duh.)
Thanks so much for your patience and help!
Here's the chat log:
Date/Time: 2010-01-29 14:05:49.036 -0600
OS Version: 10.4.11 (Build 8S165)
Report Version: 4
iChat Connection Log:
AVChat started with ID 2853609893.
0x63bb350: State change from AVChatNoState to AVChatStateWaiting.
Laura Macburke2: State change from AVChatNoState to AVChatStateInvited.
0x63bb350: State change from AVChatStateWaiting to AVChatStateConnecting.
Laura Macburke2: State change from AVChatStateInvited to AVChatStateConnecting.
0x63bb350: State change from AVChatStateConnecting to AVChatStateConnected.
Laura Macburke2: State change from AVChatStateConnecting to AVChatStateConnected.
0x63bb350: State change from AVChatStateConnected to AVChatStateEnded.
2010-01-29 14:05:45 -0600: Participant 0x63bb350: VC connection failed.
Chat ended with error -20
Laura Macburke2: State change from AVChatStateConnected to AVChatStateEnded.
Chat ended with error -20
Video Conference Error Report:
34.059291 @SIP/Transport.c:121 type=4 (00000000/0)
[NOTIFY sip:[email protected]:56754 SIP/2.0
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
Max-Forwards: 70
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
Contact: <sip:[email protected]>;isfocus
Event: conference
Subscription-State: terminated;reason=noresource
User-Agent: Viceroy 1.2
Content-Length: 0
32.494025 @:0 type=4 (00000000/0)
[VCNO_REMOTEPACKETS]
[18]
30.067686 @SIP/Transport.c:121 type=4 (00000000/0)
[NOTIFY sip:[email protected]:56754 SIP/2.0
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
Max-Forwards: 70
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
Contact: <sip:[email protected]>;isfocus
Event: conference
Subscription-State: terminated;reason=noresource
User-Agent: Viceroy 1.2
Content-Length: 0
26.059537 @SIP/Transport.c:121 type=4 (00000000/0)
[NOTIFY sip:[email protected]:56754 SIP/2.0
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
Max-Forwards: 70
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
Contact: <sip:[email protected]>;isfocus
Event: conference
Subscription-State: terminated;reason=noresource
User-Agent: Viceroy 1.2
Content-Length: 0
24.061281 @SIP/Transport.c:121 type=4 (00000000/0)
[NOTIFY sip:[email protected]:56754 SIP/2.0
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
Max-Forwards: 70
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
Contact: <sip:[email protected]>;isfocus
Event: conference
Subscription-State: terminated;reason=noresource
User-Agent: Viceroy 1.2
Content-Length: 0
23.162985 @SIP/Transport.c:121 type=4 (00000000/0)
[NOTIFY sip:[email protected]:56754 SIP/2.0
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
Max-Forwards: 70
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
Contact: <sip:[email protected]>;isfocus
Event: conference
Subscription-State: terminated;reason=noresource
User-Agent: Viceroy 1.2
Content-Length: 0
22.576970 @SIP/Transport.c:121 type=4 (00000000/0)
[NOTIFY sip:[email protected]:56754 SIP/2.0
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
Max-Forwards: 70
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
Contact: <sip:[email protected]>;isfocus
Event: conference
Subscription-State: terminated;reason=noresource
User-Agent: Viceroy 1.2
Content-Length: 0
9.754589 @SIP/Transport.c:121 type=4 (00000000/0)
[NOTIFY sip:[email protected]:56754 SIP/2.0
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK199efcba4d7aa545
Max-Forwards: 70
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 2 NOTIFY
Contact: <sip:[email protected]>;isfocus
Event: conference
Subscription-State: active;expires=3600
User-Agent: Viceroy 1.2
Content-Type: application/conference-info+xml
Content-Length: 205
[<c-i v="0" st="f" en="sip:[email protected]">
c<h>i</h><m t="a"/><m t="v"/>
c<h>o</h><m t="a"/><m t="v"/>
</c-i>
9.753208 @SIP/Transport.c:121 type=4 (00000000/0)
[SIP/2.0 200 OK
Via: SIP/2.0/UDP m.0:56751;branch=z9hG4bK03684cb47799c88d
To: "u0" <sip:[email protected]>;tag=385103684
From: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 1 SUBSCRIBE
Contact: <sip:[email protected]>;isfocus
Expires: 3600
User-Agent: Viceroy 1.2
Content-Length: 0
9.664868 @SIP/Transport.c:121 type=4 (00000000/0)
[ACK sip:[email protected]:56754 SIP/2.0
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK158fdb603882a2ef
Max-Forwards: 70
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 1 ACK
User-Agent: Viceroy 1.2
Content-Length: 0
9.099356 @SIP/Transport.c:121 type=4 (00000000/0)
[INVITE sip:[email protected]:56754 SIP/2.0
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK0589ec793bcf2336
Max-Forwards: 70
To: "Laura Macburke2" <sip:[email protected]:56754>
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 1 INVITE
Contact: <sip:[email protected]>;isfocus
User-Agent: Viceroy 1.2
Content-Type: application/sdp
Content-Length: 536
[v=0
o=admin 0 0 IN IP4 uen0.0
s=u0
c=IN IP4 uen0.0
b=AS:2147483647
t=0 0
a=hwi:34:1:1200
a=bandwidthDetection:YES
a=iChatEncryption:NO
m=audio 16386 RTP/AVP 12 3 0
a=rtcp:16387
a=rtpmap:3 GSM/8000/1
a=rtpmap:0 PCMU/8000/1
a=rtpID:1892442351
m=video 16384 RTP/AVP 126 34
a=rtcp:16385
a=rtpmap:126 X-H264/90000
a=rtpmap:34 H263/90000
a=fmtp:34 imagesize 0 rules 15:352:288
a=framerate:20
a=RTCP:AUDIO 16387 VIDEO 16385
a=pogo
a=fmtp:126 imagesize 0 rules 20:160:120:160:120
a=rtpID:123999715
Video Conference Support Report:
34.059656 @SIP/Transport.c:1218 type=1 (00000000/0)
[SIP/2.0 200 OK
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
User-Agent: Viceroy 1.2
Content-Length: 0
33.137083 @:0 type=2 (00000000/2)
[VCCALL_ENDEDCOUNT]
[17]
30.069301 @SIP/Transport.c:1218 type=1 (00000000/0)
[SIP/2.0 200 OK
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
User-Agent: Viceroy 1.2
Content-Length: 0
26.059889 @SIP/Transport.c:1218 type=1 (00000000/0)
[SIP/2.0 200 OK
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
User-Agent: Viceroy 1.2
Content-Length: 0
24.061489 @SIP/Transport.c:1218 type=1 (00000000/0)
[SIP/2.0 200 OK
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
User-Agent: Viceroy 1.2
Content-Length: 0
23.164466 @SIP/Transport.c:1218 type=1 (00000000/0)
[SIP/2.0 200 OK
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
User-Agent: Viceroy 1.2
Content-Length: 0
22.578864 @SIP/Transport.c:1218 type=1 (00000000/0)
[SIP/2.0 200 OK
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK6ddeb2cf73f6ce49
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 3 NOTIFY
User-Agent: Viceroy 1.2
Content-Length: 0
11.029675 @:0 type=2 (00000000/2)
[VCVIDEO_STARTCOMPLETED]
[16]
11.029646 @:0 type=2 (00000000/2)
[VCVIDEO_INCOMINGCOMPLETION]
[11]
10.719451 @:0 type=2 (00000000/2)
[VCUSE_INTERNALMIC]
[29]
10.650426 @:0 type=2 (00000000/2)
[VCUSEDV]
[27]
9.763906 @SIP/Transport.c:1218 type=1 (00000000/0)
[SIP/2.0 200 OK
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK199efcba4d7aa545
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 2 NOTIFY
User-Agent: Viceroy 1.2
Content-Length: 0
9.688386 @SIP/Transport.c:1218 type=1 (00000000/0)
[SUBSCRIBE sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP m.0:56751;branch=z9hG4bK03684cb47799c88d
Max-Forwards: 70
To: "u0" <sip:[email protected]>;tag=385103684
From: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 1 SUBSCRIBE
Contact: <sip:[email protected]:56751>
Event: conference
Expires: 3600
User-Agent: Viceroy 1.2
Content-Length: 0
9.613321 @SIP/Transport.c:1218 type=1 (00000000/0)
[SIP/2.0 200 OK
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK0589ec793bcf2336
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 1 INVITE
Contact: <sip:[email protected]:56751>
User-Agent: Viceroy 1.2
Content-Type: application/sdp
Content-Length: 413
v=0
o=lauraburke 0 0 IN IP4 m.0
s=u0
c=IN IP4 m.0
b=AS:2147483647
t=0 0
a=hwi:784:1:1800
a=bandwidthDetection:YES
a=iChatEncryption:NO
m=audio 56759 RTP/AVP 12
a=rtcp:56760
a=rtpID:-337239833
m=video 56757 RTP/AVP 126
a=rtcp:56758
a=rtpmap:126 X-H264/90000
a=RTCP:AUDIO 56760 VIDEO 56758
a=fmtp:126 imagesize 0 rules 15:160:120:160:120
a=framerate:15
a=rtpID:-362537079
9.195704 @:0 type=2 (00000000/0)
[VCVIDEO_INCOMINGATTEMPT]
[3]
9.119168 @SIP/Transport.c:1218 type=1 (00000000/0)
[SIP/2.0 180 Ringing
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK0589ec793bcf2336
To: "Laura Macburke2" <sip:[email protected]:56754>;tag=1831371757
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 1 INVITE
Contact: <sip:[email protected]:56751>
User-Agent: Viceroy 1.2
Content-Length: 0
9.118898 @SIP/Transport.c:1218 type=1 (00000000/0)
[SIP/2.0 100 Trying
Via: SIP/2.0/UDP uen0.0;branch=z9hG4bK0589ec793bcf2336
To: "Laura Macburke2" <sip:[email protected]:56754>
From: "u0" <sip:[email protected]>;tag=385103684
Call-ID: 7352bd3a-0d09-11df-b5ee-a3591bb813c4@66-227-184-124
CSeq: 1 INVITE
User-Agent: Viceroy 1.2
Content-Length: 0
0.266057 @:0 type=2 (00000000/2)
[VCUSEDV]
[27]
0.000000 @:0 type=2 (00000000/2)
[VCUSEDV]
[27]

When I power up my mac, I see the white screen and the apple icon. After a few seconds of powering up the screen goes dark. Yet I still can the mouse arrow but nothing else.

When I power up my Imac, I see the white screen and the apple icon. After a few seconds the screen goes dark. I am able to still see the mouse arrow as I move it around. But nothing else. What is the problem and how do I recover?

Try this from another user:
1. Shut the computer down by holding the power button for 10 seconds
2. Restart the computer and press shift at the same time until you see the progress bar start moving
3. Once you reach the point where your screen goes dark and you see the cursor, type the first letter of the username for your computer, then hit Enter, then type your password, then hit Enter.
4. After a moment, you should see the spinning beach ball
5. Your screen should then move on to something along the lines of "Completing OSX Installation" (I can't remember the exact wording). Let it finish. After that it should go to your normal desktop and the issue should be fixed. (If your screen goes pitch black during this process, hit the space bar. I thought it wasn't working, but the screen was just sleeping).

VTY shell freezes after a few seconds?

Hi,
I'm experiencing an odd issue; I don't start the X server at boot however, after a few seconds the VTY will just freeze totally?
The system hasn't hung as I can still access over the network via SSH, and the X server when started (via SSH) works fine.
Basically after a few seconds there is no keyboard input, though at first it does work. So after logging into user account I can use it properly before it will just freeze and I will forced to login through the network using SSH.
Last night after a kernel update it seems the issue got remedied but after a reboot seems to have come back.
Kernel version is: 3.17.3-1 64 bit
The actual system is a Zotac D2550 ATOM mini-itx board
keyboard is standard USB PC keyboard
On boot there was a kernel message about something needing to be run with update, but it went too fast for me to catch and couldn't find it in my logs again. I wonder if that's the issue?
Could anyone suggest something I could try in order to be able to debug this? I can provide more information if needed, though at present I'm not sure what. I also attempted to search for the issue but most results came back with kernel freeze which isn't what I'm experiencing as it seems to be either related to usb devices or the VTY shell specifically.
Thanks.
[EDIT]
Actually I have just tested and keyboard is not functioning even when running the X server - though it does function at first like stated above.
Quick extra edit, did some more digging:
https://bbs.archlinux.org/viewtopic.php?id=185273
seems related.
GPU is Nvidia! forgot to mention that; lspci mentions it as GT610 - currently using "nvidia" package perhaps I should be using one of the other ones?
Last edited by JohnnySSH (2014-11-17 12:50:31)

The shell is Bash, however I am not sure if it's the shell or VTY directly?? Basically it seems that the input doesn't work any more after a few seconds.... perhaps something to do with USB layer in kernel?
Shell otherwise from SSH is fine (Bash again). Also cursor is flashing but just no input after a while.
Unfortunately I don't see anything
Output of dmesg just shows:
[ 5.741904] hidraw: raw HID events driver (C) Jiri Kosina
[ 6.001452] usbcore: registered new interface driver usbhid
[ 6.001454] usbhid: USB HID core driver
[ 6.134172] hid-generic 0003:05A4:9881.0001: input,hidraw0: USB HID v1.10 Keyboard [HID 05a4:9881] on usb-0000:00:1d.1-1/input0
[ 6.159223] hid-generic 0003:05A4:9881.0002: input,hidraw1: USB HID v1.10 Mouse [HID 05a4:9881] on usb-0000:00:1d.1-1/input1
Nothing related in journalctl.

Hello there, am new here and very stressed, i have an Imac core i3 which is logging off itself after a few seconds of login, it goes back to the login menu where i put the password. I have tried to repair the os but my pioneer rom is not reading the disk.

Hello there, am new here and very stressed, i have an Imac core i3 which is logging off itself after a few seconds of login, it goes back to the login menu where i put the password. I have tried to repair the os but my pioneer rom is not reading the disk. I press the :c" button on startup but its not picking up the disk in the rom, i have tried to put the disk in an external rom but same answer, am starting to think that my os disk is bad. Please help me.

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of this exercise is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login. Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
*Note: If FileVault is enabled under Mac OS X 10.7 or later, or if a firmware password is set, you can’t boot in safe mode.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem(s)?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

IMac Freezes on users choice screen after a few seconds...

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