Member Avatar for Neverg!veup

I am facing flickering problem.
Am using Fedora12 and it occurs almost thrice a day
when flickering starts keyboard n mouse both dont work
Restarting is the only option
i checkd d cables they r fine
I thought d issue might b wid RAM or Motherboard
Can anyone help me
Thanks in advance

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  • Latest Post Latest Post by techsheaven

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Quick, practical diagnostics to narrow software vs hardware causes. described an intermittent flicker that eventually leaves the system unresponsive; correctly pushed isolation — the next step is to capture evidence while the fault happens so you can tell whether it is X/graphics, a kernel/hardware error, or thermal/power related.

Enable remote access and capture logs from another machine so the event can be recorded without losing visibility. From a working shell on the Fedora box and from a remote host you can monitor and save recent messages:

# ensure SSH is installed and enabled (Fedora 12)
yum install -y openssh-server
service sshd start
chkconfig sshd on

# from another PC, monitor logs in real time
ssh user@fedora "tail -F /var/log/messages /var/log/Xorg.0.log"

# after a freeze, save recent kernel and X output
ssh user@fedora "dmesg | tail -n 200 > /tmp/dmesg-after.txt"
ssh user@fedora "grep -n '\(EE\)' /var/log/Xorg.0.log > /tmp/x_errors.txt"

Run a full memory test (memtest86+) from GRUB to rule out RAM problems, and try a safe X fallback driver to eliminate the accelerated driver as the culprit. Example minimal device section for a temporary vesa fallback:

Section "Device"
  Identifier "Card0"
  Driver     "vesa"
EndSection

Back up any config before editing. Also boot a modern live Linux image: if the problem persists there, hardware or firmware is likely; if it disappears, an outdated driver/kernel in Fedora 12 is the suspect. Check temperatures with lm_sensors, update BIOS/firmware, and collect the saved logs when asking for further help. Useful references: dmesg manual (man7.org), X.Org log file notes (), and memtest downloads (memtest.org).

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Member Avatar for techsheaven

Sometimes refresh rates will be wrong on new Linux installations, but this is a non-stop flickering. It sounds like a device is hanging the system, I would begin by disconnecting peripherals except a standard keyboard. If the problem persists with this configuration, load setup defaults in the bios, and then disable caching and shadowing. Post your progress & questions here, and we will work through it.

Good Luck

Member Avatar for Neverg!veup

Hi techsheaven
Thanks for the reply. This time I will try this and hope for problem's solution.

Cheers

Member Avatar for techsheaven

Let us know what you find out!

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