How to improve Lenovo Ideapad Z580 battery backup time and reduce heat in Ubuntu Linux

The Lenovo Ideapad Z580 comes with the Intel HD 4000 on board graphics and a Nvidia GT630M 1 GB DDR3 graphics card. The technology behind it is called Optimus, where in Windows, the computer can manage the switch between the graphics cards (on board or otherwise) when graphics power is needed.

As the Nvidia graphics . . . → Read More: How to improve Lenovo Ideapad Z580 battery backup time and reduce heat in Ubuntu Linux

Ubuntu 12.04 LTS freeze when booting with newer kernels on Lenovo Ideapad Z580

This is due to an issue in the BIOS where booting gets stuck due to ACPI and battery support. Refer this link https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1093217/comments/63.

Now start up a terminal window and type the following commands: $ sudo apt-get install iasl <enter> $ sudo cp /sys/firmware/acpi/tables/DSDT /home/user/DSDT.bac $ sudo chown user.group DSDT.bac <enter> $ cp DSDT.bac DSDT . . . → Read More: Ubuntu 12.04 LTS freeze when booting with newer kernels on Lenovo Ideapad Z580

Use gkrellm to watch and monitor system health parameters

Use the GNU krellm monitors to watch and monitor system health parameters. Very good for server environments where performance monitoring is part of the server administrator’s job.

CPU temperature in Linux

Applies to Compaq Presario C700 series: CPU temperature is monitored by a proc file at following path: /proc/acpi/thermal_zone/TZ01/temperature

Adding a command like below will display the temperature every 2 seconds. $ watch cat /proc/acpi/thermal_zone/TZ01/temperature

Boot from USB drive on Intel D845GEBV2 motherboard

Ensure that legacy USB support is enabled in BIOS and speed is full speed. Go to boot menu in BIOS and choose Removable Drives. Make sure that you have plugged in the USB Drive before doing so in the computer. Then set boot device priority to USB in place of floppy disk. Now it will . . . → Read More: Boot from USB drive on Intel D845GEBV2 motherboard

Standard boot POST errors

1 short beep – System is OK 2 short beeps – POST Error – code shown on screen No beep – Power supply or board problem Continous beep – Power, board or keyboard problem Repeating short beeps – Power supply or board problem 1 long, 1 short beep – System board problem 1 long, 2 . . . → Read More: Standard boot POST errors

Speed up your PC

Enable Video ROM BIOS shadow option. Enable L1 & L2 caches without ECC checking Onboard graphics shared VGA memory should be 16MB for 128MB of RAM. Reduce CAS (Column Access Strobe) latency. Try 2 in place of 3. But if system crashes, revert back to earlier value.

. . . → Read More: Speed up your PC

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