How to diagnose software / driver / video card issue?

My computer has been freezing up on a regular basis for the past few weeks . . .
I initially assumed it to be a bad stick of RAM, but I was able to reproduce the lockup with each stick individually.
I tried downgrading the kernel (but not Xorg or nvidia drivers), and that didn't fix anything.
At this point I don't really know enough (especially related to Arch specifically) as to how (which) log files to check for a reported error and issue.
The main issue of locking up occurs when I'm watching something on VLC at full screen. It's exacerbated with browsing or doing other stuff at the same time.
After a lockup I don't know if I should be checking journalctl / dmesg / Xorg.log / htop / etc . . .
Any advice / direction of stuff I can be checking after a crash would be MUCH appreciated. It really sucks not being able to use my PC like I used to.
If it help any my board/RAM are ~6yrs old, but the gfx card is new as of this year (I am using the regular nvidia drivers and multilib): EVGA 02G-P4-2645-KR GeForce GT 640
http://www.newegg.com/Product/Product.a … 6814130796

siberianli wrote:
Hi, I also have stability issues so I am also interested in tips how to diagnose an unstable system. In my case, in journalctl the problems right before freezing can be seen, e.g.
Nov 05 21:42:59 HT-PC kernel: BUG: unable to handle kernel paging request at ffffff7f811b3f25
Nov 05 21:42:59 HT-PC kernel: IP: [<ffffff7f811b3f25>] 0xffffff7f811b3f24
Nov 05 21:42:59 HT-PC kernel: PGD 0
Nov 05 21:42:59 HT-PC kernel: Oops: 0010 [#1] PREEMPT SMP
Nov 05 21:42:59 HT-PC kernel: Modules linked in: fuse nvidia(PO) drm bnep snd_hda_codec_hdmi rc_anysee snd_hda_codec_rea
Nov 05 21:42:59 HT-PC kernel: CPU: 0 PID: 769 Comm: plugin-containe Tainted: P C O 3.11.6-1-ARCH #1
Nov 05 21:42:59 HT-PC kernel: Hardware name: nVidia MCP7A/To be filled by O.E.M., BIOS 080015 03/24/2010
Nov 05 21:42:59 HT-PC kernel: task: ffff8800ca6cedb0 ti: ffff8800ca17a000 task.ti: ffff8800ca17a000
Nov 05 21:42:59 HT-PC kernel: RIP: 0010:[<ffffff7f811b3f25>] [<ffffff7f811b3f25>] 0xffffff7f811b3f24
Nov 05 21:42:59 HT-PC kernel: RSP: 0018:ffff8800ca17bf50 EFLAGS: 00010246
Nov 05 21:42:59 HT-PC kernel: RAX: 0000000000000001 RBX: 00000000ffffffff RCX: 00007f55285b3b78
Nov 05 21:42:59 HT-PC kernel: RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
Nov 05 21:42:59 HT-PC kernel: RBP: ffff8800ca17bf78 R08: ffff8800ca17bbac R09: 0000000000000000
Nov 05 21:42:59 HT-PC kernel: R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
Nov 05 21:42:59 HT-PC kernel: R13: 00007f55285b3b70 R14: 0000000000000001 R15: 00007f55285b4700
Nov 05 21:42:59 HT-PC kernel: FS: 00007f55285b4700(0000) GS:ffff88011fc00000(0000) knlGS:0000000000000000
Nov 05 21:42:59 HT-PC kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Nov 05 21:42:59 HT-PC kernel: CR2: ffffff7f811b3f25 CR3: 00000000ca16d000 CR4: 00000000000407f0
Nov 05 21:42:59 HT-PC kernel: Stack:
Nov 05 21:42:59 HT-PC kernel: 00007f5535615320 00007f553550ad78 00007f55285b3b70 0000000000000001
Nov 05 21:42:59 HT-PC kernel: 00007f5536cf1300 00007f55285b3be0 ffffffff814ea5dd 0000000000000293
Nov 05 21:42:59 HT-PC kernel: 0000000000000400 0000000000000000 0000000000000000 0000000000000007
Nov 05 21:42:59 HT-PC kernel: Call Trace:
Nov 05 21:42:59 HT-PC kernel: [<ffffffff814ea5dd>] system_call_fastpath+0x1a/0x1f
Nov 05 21:42:59 HT-PC kernel: Code: Bad RIP value.
Nov 05 21:42:59 HT-PC kernel: RIP [<ffffff7f811b3f25>] 0xffffff7f811b3f24
Nov 05 21:42:59 HT-PC kernel: RSP <ffff8800ca17bf50>
Nov 05 21:42:59 HT-PC kernel: CR2: ffffff7f811b3f25
Nov 05 21:42:59 HT-PC kernel: ---[ end trace 28ebc192d739a417 ]---
I tried various video drivers; nvidia 304, 325, 331 and nouveau, but in any case the system freezes after playing video for half an hour or so. The problem is more rare on a 32 bit installation than 64 bit, so perhaps you could move from 64 to 32 bit?
sorry for your troubles! i am not sure what the exact issue is, but i am on nvidia w/ video troubles as well . . . i have been running atop 24/7 and notice high r/w use of my disk at times when playback starts to stutter . . .
i haven't had a full-on lockup in days, but have still had one in recent time. i am not really sure how to trouble shoot this further.

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Just wanted to see if anyone was having issues like I'm seeing in these two pics.
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http://i44.tinypic.com/2v146ep.jpg
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http://i44.tinypic.com/vqhafk.jpg
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Message was edited by: JeffrySG
Message was edited by: JeffrySG

Upon inspection of the card it is totally loaded with dust. I found this article:
http://macsaregreat.com/?p=63
which has some pics and this thread:
http://discussions.apple.com/thread.jspa?threadID=1265166&start=0&tstart=0
which discusses many issues as well with the X1900 and Leopard. I first started seeing issues with the card during my 3d work after I installed Leopard.
I'm off to the computer store to pick up some compressed air to try to clean that vent now. I already use smcFanControl already, before using it I was getting card errors every day.
Thanks again for the info regarding the dust on that card.
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Cheers,
George
In daily use: R60F, R500F, T61, T410
Collecting dust: T60
Enjoying retirement: A31p, T42p,
Non-ThinkPads: Panasonic CF-31 & CF-52, HP 8760W
Starting Thursday, 08/14/2014 I'll be away from the forums until further notice. Please do NOT send private messages since I won't be able to read them. Thank you.

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Apple guarantees their work, take it back.

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1. This procedure is a diagnostic test. It changes nothing, for better or worse, and therefore will not, in itself, solve the problem. But with the aid of the test results, the solution may take a few minutes, instead of hours or days.
Don't be put off by the complexity of these instructions. The process is much less complicated than the description. You do harder tasks with the computer all the time.
2. If you don't already have a current backup, back up all data before doing anything else. The backup is necessary on general principle, not because of anything in the test procedure. Backup is always a must, and when you're having any kind of trouble with the computer, you may be at higher than usual risk of losing data, whether you follow these instructions or not.
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3. Below are instructions to run a UNIX shell script, a type of program. As I wrote above, it changes nothing. It doesn't send or receive any data on the network. All it does is to generate a human-readable report on the state of the computer. That report goes nowhere unless you choose to share it. If you prefer, you can act on it yourself without disclosing the contents to me or anyone else.
You should be wondering whether you can believe me, and whether it's safe to run a program at the behest of a stranger. In general, no, it's not safe and I don't encourage it.
In this case, however, there are a couple of ways for you to decide whether the program is safe without having to trust me. First, you can read it. Unlike an application that you download and click to run, it's transparent, so anyone with the necessary skill can verify what it does.
You may not be able to understand the script yourself. But variations of the script have been posted on this website thousands of times over a period of years. The site is hosted by Apple, which does not allow it to be used to distribute harmful software. Any one of the millions of registered users could have read the script and raised the alarm if it was harmful. Then I would not be here now and you would not be reading this message.
Nevertheless, if you can't satisfy yourself that these instructions are safe, don't follow them. Ask for other options.
4. Here's a summary of what you need to do, if you choose to proceed:
☞ Copy a line of text in this window to the Clipboard.
☞ Paste into the window of another application.
☞ Wait for the test to run. It usually takes a few minutes.
☞ Paste the results, which will have been copied automatically, back into a reply on this page.
The sequence is: copy, paste, wait, paste again. You don't need to copy a second time. Details follow.
5. You may have started the computer in "safe" mode. Preferably, these steps should be taken in “normal” mode, under the conditions in which the problem is reproduced. If the system is now in safe mode and works well enough in normal mode to run the test, restart as usual. If you can only test in safe mode, do that.
6. If you have more than one user, and the one affected by the problem is not an administrator, then please run the test twice: once while logged in as the affected user, and once as an administrator. The results may be different. The user that is created automatically on a new computer when you start it for the first time is an administrator. If you can't log in as an administrator, test as the affected user. Most personal Macs have only one user, and in that case this section doesn’t apply. Don't log in as root.
7. The script is a single long line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, though you may not see all of it in the browser window, and you can then copy it. If you try to select the line by dragging across the part you can see, you won't get all of it.
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dtrace sudo\ profiles sed\ -En awk /S*/*/P*/*/*/C*/*/airport networksetup mdutil sudo\ lsof test osascript\ -e sysctl\ -n pluginkit );c2=(com.apple.loginwindow\ LoginHook '" /L*/P*/loginw*' "'tell app \"System Events\" to get properties of login items'|tr , \\\n" 'L*/Ca*/com.ap*.Saf*/E*/* -d 1 -name In*t -exec '"${c1[14]}"' :CFBundleDisplayName" {} \;|sort|uniq' '~ $TMPDIR.. $ -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 $' '.??* -path .Trash -prune -o -type d -name *.app -print -prune' :${p[35]}\" :Label\" '{/,}L*/{Con,Pref}* -type f ! -size 0 -name *.plist -exec plutil -s {} \;' "-f'%N: %l' Desktop L*/Keyc*" therm sysload boot-args status " -F '\$Time \$(RefProc): \$Message' -k Sender kernel -k Message Req 'bad |Beac|caug|corru|dead[^bl]|FAIL|fail|GPU |hfs: Ru|inval|jnl:|last value [1-9]|n Cause: -|NVDA$|pagin|proc: t|Roamed|rror|ssert|Thrott|tim(ed? ?|ing )o|WARN' -k Message Rne 'Goog|ksadm|Roame|SMC:|suhel| VALI|ver-r|xpma' -o -o -k Sender fseventsd -k Message Req SL -o -k Sender Req launchd -k Message Req de: " '-du -n DEV -n EDEV 1 10' 'acrx -o comm,ruid,%cpu' '-t1 10 1' '-f -pfc /var/db/r*/com.apple.*.{BS,Bas,Es,J,OSXU,Rem,up}*.bom' '{/,}L*/Lo*/Diag* -type f -regex .\*[cght] ! -name .?\* ! -name \*ag \( -exec grep -lq "^Thread c" {} \; -exec printf \* \; -o -true $ -execdir stat -f:%Sc:%N -t%F {} \;|sort -t: -k2 |tail -n'${p[38]} '/S*/*/Ca*/*xpc* >&- ||echo No' '-L /{S*/,}L*/StartupItems -type f -exec file {} +' '-L /S*/L*/{C*/Sec*A,Ex}* {/,}L*/{A*d,Ca*/*/Ex,Co{mpon,reM},Ex,In{p,ter},iTu*/*P,Keyb,Mail/B,Pr*P,Qu*T,Scripti,Sec,Servi,Spo,Widg}* -path \\*s/Resources -prune -o -type f -name Info.plist' '/usr/lib -type f -name *.dylib' `awk "${s[31]}"<<<${p[23]}` "/e*/{auto,{cron,fs}tab,hosts,{[lp],sy}*.conf,mach_i*/*,pam.d/*,ssh{,d}_config,*.local} {,/usr/local}/etc/periodic/*/* /L*/P*{,/*}/com.a*.{Bo,sec*.ap}*t {/S*/,/,}L*/Lau*/*t .launchd.conf" list getenv /Library/Preferences/com.apple.alf\ globalstate --proxy '-n get default' -I --dns -getdnsservers\ "${p[N5]}" -getinfo\ "${p[N5]}" -P -m\ / '' -n1 '-R -l1 -n1 -o prt -stats command,uid,prt' '--regexp --only-files --files com.apple.pkg.*|sort|uniq' -kl -l -s\ / '-R -l1 -n1 -o mem -stats command,uid,mem' '+c0 -i4TCP:0-1023' com.apple.dashboard\ layer-gadgets '-d /L*/Mana*/$USER&&echo On' '-app Safari WebKitDNSPrefetchingEnabled' "+c0 -l|awk '{print(\$1,\$3)}'|sort|uniq -c|sort -n|tail -1|awk '{print(\$2,\$3,\$1)}'" -m 'L*/{Con*/*/Data/L*/,}Pref* -type f -size 0c -name *.plist.???????|wc -l' kern.memorystatus_vm_pressure_level );N1=${#c2[@]};for j in {0..9};do c2[N1+j]=SP${p[j]}DataType;done;N2=${#c2[@]};for j in 0 1;do c2[N2+j]="-n ' syscall::'${p[33+j]}':return { @out[execname,uid]=sum(arg0) } tick-10sec { trunc(@out,1);exit(0);} '";done;l=(Restricted\ files Hidden\ apps 'Elapsed time (s)' POST Battery Safari\ extensions Bad\ plists 'High file counts' User Heat System\ load boot\ args FileVault Diagnostic\ reports Log 'Free space (MiB)' 'Swap (MiB)' Activity 'CPU per process' Login\ hook 'I/O per process' Mach\ ports kexts Daemons Agents XPC\ cache Startup\ items Admin\ access Root\ access Bundles dylibs Apps Font\ issues Inserted\ dylibs Firewall Proxies DNS TCP/IP Wi-Fi Profiles Root\ crontab User\ crontab 'Global login items' 'User login items' Spotlight Memory Listeners Widgets Parental\ Controls Prefetching SATA Descriptors App\ extensions Lockfiles Memory\ pressure );N3=${#l[@]};for i in 0 1 2;do l[N3+i]=${p[5+i]};done;N4=${#l[@]};for j in 0 1;do l[N4+j]="Current ${p[29+j]}stream data";done;A0() { id -G|grep -qw 80;v[1]=$?;((v[1]==0))&&sudo true;v[2]=$?;v[3]=`date +%s`;clear >&-;date '+Start time: %T %D%n';};for i in 0 1;do eval ' A'$((1+i))'() { v=` eval "${c1[$1]} ${c2[$2]}"|'${c1[30+i]}' "${s[$3]}" `;[[ "$v" ]];};A'$((3+i))'() { v=` while read i;do [[ "$i" ]]&&eval "${c1[$1]} ${c2[$2]}" \"$i\"|'${c1[30+i]}' "${s[$3]}";done<<<"${v[$4]}" `;[[ "$v" ]];};A'$((5+i))'() { v=` while read i;do '${c1[30+i]}' "${s[$1]}" "$i";done<<<"${v[$2]}" `;[[ "$v" ]];};';done;A7(){ v=$((`date +%s`-v[3]));};B2(){ v[$1]="$v";};for i in 0 1;do eval ' B'$i'() { v=;((v['$((i+1))']==0))||{ v=No;false;};};B'$((3+i))'() { v[$2]=`'${c1[30+i]}' "${s[$3]}"<<<"${v[$1]}"`;} ';done;B5(){ v[$1]="${v[$1]}"$'\n'"${v[$2]}";};B6() { v=` paste -d: <(printf "${v[$1]}") <(printf "${v[$2]}")|awk -F: ' {printf("'"${f[$3]}"'",$1,$2)} ' `;};B7(){ v=`grep -Fv "${v[$1]}"<<<"$v"`;};C0() { [[ "$v" ]]&&sed -E "$s"<<<"$v";};C1() { [[ "$v" ]]&&printf "${f[$1]}" "${l[$2]}" "$v"|sed -E "$s";};C2() { v=`echo $v`;[[ "$v" != 0 ]]&&C1 0 $1;};C3() { v=`sed -E "${s[63]}"<<<"$v"`&&C1 1 $1;};for i in 1 2;do for j in 0 2 3;do eval D$i$j'(){ A'$i' $1 $2 $3; C'$j' $4;};';done;done;{ A0;D20 0 $((N1+1)) 2;D10 0 $N1 1;B0;C2 27;B0&&! B1&&C2 28;D12 15 37 25 8;A1 0 $((N1+2)) 3;C0;D13 0 $((N1+3)) 4 3;D23 0 $((N1+4)) 5 4;D13 0 $((N1+9)) 59 50;for i in 0 1 2;do D13 0 $((N1+5+i)) 6 $((N3+i));done;D13 1 10 7 9;D13 1 11 8 10;D22 2 12 9 11;D12 3 13 10 12;D23 4 19 44 13;D23 5 14 12 14;D22 6 36 13 15;D22 38 52 66 54;D22 7 37 14 16;D23 8 15 38 17;D22 9 16 16 18;B1&&{ D22 35 49 61 51;D22 11 17 17 20;for i in 0 1;do D22 28 $((N2+i)) 45 $((N4+i));done;};D22 12 44 54 45;D22 12 39 15 21;A1 13 40 18;B2 4;B3 4 0 19;A3 14 6 32 0;B4 0 5 11;A1 17 41 20;B7 5;C3 22;B4 4 6 21;A3 14 7 32 6;B4 0 7 11;B3 4 0 22;A3 14 6 32 0;B4 0 8 11;B5 7 8;B1&&{ A2 19 26 23;B7 7;C3 23;};A2 18 26 23;B7 7;C3 24;D13 4 21 24 26;B4 4 12 26;B3 4 13 27;A1 4 22 29;B7 12;B2 14;A4 14 6 52 14;B2 15;B6 14 15 4;B3 0 0 30;C3 29;A1 4 23 27;B7 13;C3 30;B3 4 0 65;A3 14 6 32 0;B4 0 16 11;A1 39 50 64;B7 16;C3 52;D13 24 24 32 31;D13 25 37 32 33;A2 23 18 28;B2 16;A2 16 25 33;B7 16;B3 0 0 34;B2 21;A6 47 21&&C0;B1&&{ D13 21 0 32 19;D13 10 42 32 40;D22 29 35 46 39;};D23 14 1 62 42;D12 34 43 53 44;D12 22 20 32 25;D22 0 $((N1+8)) 51 32;D13 4 8 41 6;D12 26 28 35 34;D13 27 29 36 35;A2 27 32 39&&{ B2 19;A2 33 33 40;B2 20;B6 19 20 3;};C2 36;D23 33 34 42 37;B1&&D23 35 45 55 46;D23 32 31 43 38;D12 36 47 32 48;D13 20 42 32 41;D13 37 2 48 43;D13 4 5 32 1;D13 4 3 60 5;D12 26 48 49 49;B3 4 22 57;A1 26 46 56;B7 22;B3 0 0 58;C3 47;D22 4 4 50 0;D12 4 51 32 53;D23 22 9 37 7;A7;C2 2;} 2>/dev/null|pbcopy;exit 2>&-
Copy the selected text to the Clipboard by pressing the key combination command-C.
8. Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Click anywhere in the Terminal window and paste by pressing command-V. The text you pasted should vanish immediately. If it doesn't, press the return key.
9. If you see an error message in the Terminal window such as "Syntax error" or "Event not found," enter
exec bash
and press return. Then paste the script again.
10. If you're logged in as an administrator, you'll be prompted for your login password. Nothing will be displayed when you type it. You will not see the usual dots in place of typed characters. Make sure caps lock is off. Type carefully and then press return. You may get a one-time warning to be careful. If you make three failed attempts to enter the password, the test will run anyway, but it will produce less information. In most cases, the difference is not important. If you don't know the password, or if you prefer not to enter it, press the key combination control-C or just press return three times at the password prompt. Again, the script will still run.
If you're not logged in as an administrator, you won't be prompted for a password. The test will still run. It just won't do anything that requires administrator privileges.
11. The test may take a few minutes to run, depending on how many files you have and the speed of the computer. A computer that's abnormally slow may take longer to run the test. While it's running, there will be nothing in the Terminal window and no indication of progress. Wait for the line
[Process completed]
to appear. If you don't see it within half an hour or so, the test probably won't complete in a reasonable time. In that case, close the Terminal window and report what happened. No harm will be done.
12. When the test is complete, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
At the top of the results, there will be a line that begins with the words "Start time." If you don't see that, but instead see a mass of gibberish, you didn't wait for the "Process completed" message to appear in the Terminal window. Please wait for it and try again.
If any private information, such as your name or email address, appears in the results, anonymize it before posting. Usually that won't be necessary.
13. When you post the results, you might see an error message on the web page: "You have included content in your post that is not permitted," or "You are not authorized to post." That's a bug in the forum software. Please post the test results on Pastebin, then post a link here to the page you created.
14. This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Use Agreement for the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed.

Help! Video card issues- Slow during games

Hey everyone, so heres my problem. I just got a brand new mbp 13" with 4 gigs ram with the new battery and everything. I have the game monkey island and spore on my mac. I also have windows xp installed on the other partition of my hard drive. I just need windows for one piece of software I use that I accidentally bought for my pc that died so now I'm stuck running it on my mac in windows. I also have modern warfare 2 on the windows side. Up until a couple days ago all the games were running really great, however yesterday something popped up on my windows saying something about malware (ughhh) and then call of duty on the windows side was running completely sluggish and when I restarted the computer in mac and tried to run spore or monkey island both of them are running slow too. What is weird is that it is only sluggish when running these games, never when watching movies or anything else that requires a video card. Could I have got a virus thats also affecting my mac os. Could this be a hardware issue? I'm just not sure. Would appreciate any help

If you got a virus on your Windows partition, that in itself wouldn't affect Mac OS X partition directly. If you have a Windows partition you should take all the usual Windows related measures to ensure your system is protected against Virus/ Trojans/ Malware etc by installing Anti Virus software.
Have you reset your PRAM (and/or Permissions)? Did this have any effect?
Since your MBP is so new, if a PRAM (& permissions) reset didn't help, I'd make an appointment to see a Genius at your local Apple Store and get them to check your MacBook Pro over.

How can I tell what video card and how much video memory does my iMac have?

How or where can I find out: which video card does my iMac have and how much video memory does it have? I've tried looking in System profiler, but I did not see it there. Thank you.

Once you open System Profiler there should be a line called "memory" which is the RAM (vs. hard drive size which is not what is called memory), e.g., Memory: 1.5 GB
For video click on the line Graphics/Displays and look at the chipset line, e.g., Chipset Model: GeForce2 TwinView
Kappy's instructions are handy for checking the original configuration of your computer, but that may have been changed at some time, especially if you bought it secondhand.

Driver video card changed

i've a question, in my pc i have a video card Via/S3G UniChrome Pro Igp (64 MB) integrated and the motherboard's chipset is Via K8M800/K8N800, i've changed the driver video to xf86-video-unichrome but now i've restarted the pc and all are more clearer, so what can i do to set up again the deafult brightness?
And another question, the driver xf86-video-unichrome are correct for my video card?
p.s. i've installe this version, xf86-video-unichrome-0.2.6-4
p.s.2. and if i want to use 3d in arch with this video card how can i do?
thanks
Last edited by toketin (2007-09-02 12:07:49)

The xf86-video-unichrome supports your card, you could also try the xf86-video-via driver .
I don't know the capabilities of this driver, but this is the xorg.config from another archlinux user with unichrome.

IMac early 2008 8800GS video card issue

I have had this machine for 2.5 years and all is fine until 1 day (mid of Nov) that it would not start (blank screen after apple logo).
Nov 19, 2010
I brought it to the Richmond centre apple store in Richmond, BC, Canada (since I have applecare). I was told by the apple genius there he would need to replace the logicboard and the video card with estimates of $1500+ (i was thinking i m so lucky that I have bought applecare). The repair took 1 full week and at the end they only replaced the video card. I was happy to have my imac back (Nov 25, 2010)
Dec 7, 2010
The iMac would not start up again (same symptoms to the first one) except that this time I was able to boot into safe mode (any other modes or from ext HD or DVD will not work). In safe mode, the screen has a huge vertical bars like barcode, so I have no other choice but to bring it back to apple store again (this time to Oakridge Centre in Vancouver, BC). The Apple genius there said there's a problem with the logic board and they will replace it. The repair took 1 day and both logicboard and video card were replaced (Dec 9, 2010).
Dec 30, 2010
The iMac would not start again (blank screen after apple logo). This time I m so frustrated. How can you have repair the machine 2 times, replace most of the machine components and yet the machine would not start. I m losing so much confidence with both the iMac and the technicians at the Apple store. I give the machine a few more chances to boot/cooldown, disconnect to power source. It would boot up after disconnected to the power source for extended time but the screen garbled up as soon as you bring up the dashboard or attempt to use any applications.
Jan 1, 2011
New day of the year and I have to bring the iMac to repair. I ask for either a replacement or a refund as I have no confidence in the machine that I have. The Genius said that we cannot do that but we will take it in and have a look (I have no other choice but to leave it with the hands of the technicians.)
Jan 3, 2011
Apple technician called around 8pm in the evening, he told me the problem was with the LVDS cable that attaches the logic board to the lcd panel. I was very patient (because i seriously don't think it's the LVDS cable) and not let my anger out as he is just a fellow who's trying to fix my computer. Long story short, he told me they don't have the parts and need another 3-5 days.
Anybody has a similar problem? Does it make sense that the LVDS cable can cause the mac not able to boot up?

I agree that policy with regard to replacement of online purchases vs in-store doesn't make any sense. As a customer, this experience would of frustrated me a lot. It's good you were able to eventually get a new iMac but it makes sense for them to try to fix it first before replacing it. I think before the 3rd repair I would've escalated the issue until I got to the store leader. If they understand you need it back quickly, they will usually do their best to make you happy. Of course, not everybody's perfect.
In my experience, if you need to have something soon, you need to politely go up the management chain. I never heard of the first tier employee being able to replace an iMac or do any other kind of replacement. It's always the store leaders and Genius admins that can accommodate these kind of issues.
The store leader is your friend and it's their store's reputation on the line. Ask for his/her email address and vent out your frustration to them. Recommend what you would've done as an AppleCare person to accommodate your issue. It's this kind of feedback that makes them better. Who knows, they may even reward you for your valuable feedback.

Im assuming I have video card issues?

Hi,
Just last night I played Itunes on my G5 Dual 1.8ghz/Nvidia Geoforce 6800 Ultra 256/4gb ram/Neovo E-19AFlat panel with no problems at all. However I woke up this morning and turned on the machine but screen was black. I had startup chime and even a brief glimpse of the grey screen with apple in the center then it went black. If it was the video card being burnt would I even get the grey screen? I checked the connections,rest PMU,NVRAM and PRAM. Let me also mention that when the screen is black and I push the monitor's power button off and on I get a second worth of my desktop then back to black. Also if I remember correctly after the grey screen I get a brief glimpse of the blue screen with the grey box w/ apple logo and progress bar for a second then to black again. Help please! I miss my apple......

Hi yokomo : You may have an HD corruption.
See this article:
http://docs.info.apple.com/article.html?artnum=300537
especially:
Next we're going to check to see if the computer has video when started up from a disc:
Find the Install or Restore disc that came with the computer. Insert the Software Install and Restore disc into your CD/DVD drive. The disc may look something like the picture below.
<Deleted>
Shut down your computer.
Once it's off, hold down the C key on the keyboard and start up your computer. This will start up the computer from the Software Install and Restore disc instead of your hard drive.
If you see video when started up from disc, you may have corrupted software. You can use the Archive and Install feature of the Mac OS X installer to reinstall. This kind of installation gives you a fresh version of Mac OS X, but you don't lose any data from the computer as your old information is all archived.
-Robert

Video Card Issues

Hello.
I am bit of a newbie at this PC building game and I am having some issues I was hoping you could help out with.
I am running:
AMD 3500+
MSI K8N Neo Platinum/SLI
ATI x600 All in Wonder (PCI-Express)
1 GB DDR Dual Channel RAM
Window XP SP2
Initially, Windows would boot fine, but when I attempted to run a DVD or a game (BF 1942), the video card would choke and the PC would reboot. I realized I didn't have enough power from my PS, so I upgraded.
Things are much better now, however, after a certain amount of time running, I get either a matrix style green pattern interlaced in DVD or a purple checkerboard pattern in my game. Everything still runs OK, so I am assuming I just don't have a setting right somewhere.
I have the latest listed BIOS from MSI (Dec 2004). I am running the Catalyst 5.3 drivers from ATI.
Does anyone have any suggested video card setting to try? BIOS settings? Could it be temperature?
Thanks in advance for your help.

Thanks for the replies, I will answer as many as I can now and hopefully more later.
Power Supply - Rosewill AP600X
12V-35A
5V - 50A
3.3V - 30A
I am not overclocking and I installed the Catalyst 5.3 first, so I didn't do a driver clean.
I will try to check my temps although I believe I have ample ventilation.
I will try the AA and AF settings. Any suggestion on a screen resolution?
Thanks for the help!

Does Cool N Quiet + AMD Chip Driver = Video Card Overclocking?

For some odd reason, my 9800NP is automatically changing its clock rates on me. Never down, only up. Does N Quiet and/or the AMD Chip Driver impact your video card? Right now it booted at 378/330 which is a 9800Pro. I'm using the normal BIOS for a NP, but it does show up as a pro in the Display properties. Any ideas?

I think the Cool N Quiet software doen't like RadLinker/RadClocker. I enabled Cool N Quiet in the BIOS, but did not install the associated software. All better now!!

How can you test the video card?

I just got a cinema display and I am having trouble calibrating it.
I just notice that when I open up bridge CS4 it takes awhile for it to refresh. When I go to film strip view and click on a picture it will not diplay it.
Then I change views and there is a line down the middle of the display where it gets update but the left side does not.
Any thoughts on what it could be?
Video card of is it the monitor?
How can I test it?

The only ways I can think of to test the card are XBench and the Apple Hardware Tests (insert Install DVD and restart while holding down 'd')

How to diagnose software / driver / video card issue?

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