Difference between revisions of "Build tips"
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===plays audio cds and files, but not with aplay (basiccheck)===
===plays audio cds and files, but not with aplay (basiccheck)===
Try disabling plug-and-play option in BIOS if it exists.
Try disabling plug-and-play
option in BIOS if it exists.
Revision as of 18:08, 7 February 2009
Tips for troubleshooting and repairing common problems that we see in the build workshops.
Dell GX1 fails to boot
Downgrade the bios:
- boot by ebmulti
- choose 'gx1' from net-grub
- currently broken a bit:
- hit 4 at the first freedos pause
- hit enter
- hit 4 again
- hit enter
- type 'dir' to see the list of files
- type 'gx1_a04.exe' and follow the instructions
GRUB GRUB GRUB GRUB
symptom: The system does not go into grub, but instead chants GRUB GRUB GRUB GRUB ad infinitum.
solution: Go into the BIOS, change the hard drive detection from auto to user, and change LBA to LARGE. Dave says this works 90% of the time, and the remaining 10% might be able to be fixed with a BIOS upgrade but - who's got the time for that? switch the hdd. we have more. --User:ideath 13:06, 12 May 2005 (PDT)
Hard drive clicks
symptom: cool noises
solution: recycle that drive!
symptom: the SMART utilities say the drive is gonna die solution: replace it. --User:ideath 13:06, 12 May 2005 (PDT)
Can't find or boot hard drive
- Make sure you are jumpered master and are connected to the primary ide port.
- Make sure BIOS detects it or is set to AUTO.
- Try another IDE cable.
- Floppy drive will not format the disk. You may have to try many more disks. Luckily, we have dozens.
With the power off: Remove the button battery. Also, look for a jumper on the motherboard that says either clear CMOS or clear password. Move the jumper over, say "Mary had a little lamb" (i.e. wait a few seconds), put the jumper and battery back and power back up. (if you've got a stubborn one, you might have to power cycle the computer with the battery gone and jumper set before putting them back).
Entering BIOS config
symptom: cannot get into BIOS
When trying to enter BIOS, and you can't, try the following:
- press all of the function keys and the delete key while the computer is POSTing.
- modify the hardware somehow, changed the memory or disconnect a drive
symptom: cannot get into BIOS and computer beeping
When the computer is beeping, but not posting:
- Figure out the BIOS manufacturer by looking at the BIOS chip on the motherboard.
- Check the beep code you are receiving with the list of known beep codes.
not finding sound card
symptoms: message reading "/dev/dsp can't be found"; onboard sound; IRQ 5 has nothing on it; alsaconf doesn't detect a PCI or PNP soundcard. This happened on two Dell Optiplexes.
solution: Google says they use a Crystal ISA sound card, which was an option in alsaconf. You may be able to find information about the sound chip used for your onboard sound. --User:ideath 13:06, 12 May 2005 (PDT)
won't play audio CDs
symptoms: the audio test in basiccheck plays sound, but you don't get any sound from an audio CD. solution: make sure the cable from the sound card to the CDROM is plugged in to both; double check if there are multiple places it can plug into the sound card and look for labels that might give you clues; try a different cable if it still doesn't work. --User:ideath
- You might also want to try right-clicking on the speaker symbol on the top right of the screen and choosing "Preferences". Make sure nothing's muted.
- Or, open a terminal and type "alsamixer". Make sure everything's turned on and up. Open another terminal and type "man alsamixer" for instructions on how to use this command-line tool.
plays audio cds and files, but not with aplay (basiccheck)
- Try disabling plug-and-play option in BIOS if it exists.
- If you're using a sound card, you may need to disable an on-board sound option in BIOS if it exists.
Read Xorg for general information.
X tries to start & fails
symptoms: you get the grey screen as if kdm were starting, but it eventually blinks out and drops you to the text login.keyboard and mouse are PS/2
solution: make sure the mouse is plugged in properly and in the correct port and reboot. X won't start if it doesn't think it has a mouse. --User:ideath 13:06, 12 May 2005 (PDT)
symptoms: you're returned to the console with the message "no screens found" and you're using certain kinds of ATI card (including the Riva128 card)
solution: Change the default color depth to 15, in /etc/X11/XF86Config-4 --User:Jeff
X won't start; video driver for onboard chip identified as "unknown"
Video problem with onboard video chip : VIA Technologies, Inc. VT8623 [Apollo CLE266] integrated CastleRock graphics (rev 03).
solution: Change the driver to via in /etc/X11/XF86Config-4 Jeff 03:13, 6 Aug 2005 (PDT)
second solution: Change the driver to vesa in /etc/X11/XF86Config-4 if via doesn't work. Jeff 03:14, 6 Aug 2005 (PDT)
Resolution is too small
symptoms: 640x480 screen resolution
- System -> Preferences -> Screen Resolution
- set resolution to a larger value
symptoms: 640x480 is the only available resolution
- sudo dpkg-reconfigure xserver-xorg: choose the defaults for the everything but the last question about monitors "Simple/Medium/Advanced".
- Choose simple
- then choose 17 inches
- Choose defaults until finished
- Ctl-Alt-Bksp to restart X.
symptoms: trying the above causes the system to lock up
- login as oem
- sudo /etc/init.d/gdm stop
- permform the same steps as above
- sudo /etc/init.d/gdm start
Note: In old systems, using a PCI video card may be contributing to the problem. Try an AGP video card if possible.
X overdrives monitor
symptoms: monitor presents high frequency scan lines
solution: turn down the bit depth to 16
symptoms: monitor presents high frequency scan lines and displays squished version of X
solution: check for IRQ conflict and set IRQ 3 only to legacy. Magix identified the chip but chose "unknown" driver. X wouldn't start. When we substituted "via" for "unknown" in the /etc/X11/XF86Config-4 file, x windows would start but the only resolution we could get was 600x480. A bunch of googling later we tried "vesa" for the driver and kdm worked fine. --Roy Marshall
symptoms: everything's fine until you try to go into X; then the monitor says FREQ OUT OF RANGE. it's the first time this previously-configured system has been used with this particular monitor.
solution: run magix to reconfigure X with the proper frequencies.
Onboard VGA does not function
symptom: Upon power-on, system sends nothing to VGA on-board port, connected monitor does not indicate anything is connected. This has occurred with several Dell small form factor systems.
solution: Install VGA card, load system and switch VGA cable to the on-board port at reboot time. Problem solved (sometimes). -- Kerm Jensen
Flaky ethernet card
symptom: the computer can't connect to the network after it's been imaged.
CD Drive not being recognized? First, check all of your connections, are they are secure? Is the jumper set to master?* Check the BIOS and make sure there isn't a misconfiguration. Open up a term, and run "dmesg | grep hd"--does anything come up on hdc? Finally, you may have a bad cable, try attaching a new one to the motherboard. If all this fails, grab a new CD drive and start over, going through all these steps. If your result is the same, you may have a bad CD controller, or IDE connection, consult a build instructor.
note: if the jumper is set to slave, you'll probably have trouble even booting up.
- CD burners are not a standard part of FreekBoxen, but some builders install them in their own computers. See: Installing a CD burner
- DVD players -- see Enabling a DVD-ROM