Those of us who use only Linux Laptops like Dell's Vostro 3546 with Ubuntu 12.04 LTS installed on it, cannot just apply the BIOS upgrades that Dell provides on it's web site. The BIOS update file is actually a MS DOS .EXE file and it requires MS DOS to work. Here's how to apply the … Continue reading How to upgrade Dell BIOS on a Ubuntu laptop with FreeDOS
If you are the an open source fanatic who has been sold a laptop with Windows 8 on it in India, you would have been reminded to upgrade to Windows 8.1 by Microsoft periodically. I was reminded 3 times. Each time I chose to ignore it. Finally, I decided to upgrade from Windows 8 to … Continue reading How to get back Ubuntu in Boot Menu after Windows 8 to Windows 8.1 upgrade with efibootmgr
Finally, installed Fedora 18 64 bit on the Lenovo Ideapad Z580 laptop and it works almost perfect. Basically, Fedora 18 support UEFI (Unified Extensible Firmware Interface). I tried Ubuntu 12.04.2 LTS as suggested on several blog posts first. Did a successful installation, but there were random, unpredictable hangs when booting. All of them listed USB … Continue reading Install Fedora 18 on Lenovo Ideapad Z580 laptop
Get into the BIOS by pressing the Novo button on the laptop, just near the power button. You can use the Novo button only after you shutdown the laptop. Once in, you will get a menu with the devices available for booting. Clicking on anyone of them will not start the image / Live CD … Continue reading Disable SecureBoot in BIOS of the Lenovo Ideapad Z580 laptop
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 … Continue reading How to improve Lenovo Ideapad Z580 battery backup time and reduce heat in Ubuntu Linux
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 … Continue reading Ubuntu 12.04 LTS freeze when booting with newer kernels on Lenovo Ideapad Z580
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.
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
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 … Continue reading Standard boot POST errors
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.