krish – 起死回生 [Wake up from death & return to life.]

March 15, 2013

Windows is still crazy right?

My replacement harddisk is back and I forgot to check whether I got dumped a 5400rpm instead of 7200rpm.. and now I feel too lazy to open up that box again.
Oh well, I’ll find out from the OS interface, I thought… and installed Windows on it (don’t hate; I need it for game development) AND……. I still find the OS doing drugs after all this years! 😉

5.26 Ghz??? !!! Shhh... don't tell AMD :P

5.26 Ghz??? !!!
Shhh… don’t tell AMD 😛


February 26, 2013

Ubuntu 12.04 with AMD HD6810 Radeon

Filed under: GNU/Linux — krish @ 7:16 pm
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I had been using the fglrx drivers with my AMD HD-6810 radeon card since I changed the OS (from default shipping Windows 7 to Ubuntu 12.04) on my HP dm1z 3014AU (now that’s about 2 yrs next month)

AMD command control center (amdcccle?) was controlling the settings and I had done some changes, it was all okay but when I ran my 1080 videos from ‘GoPro Hero2 Motorsports Edition’ .. they’d tear and lag (so did my 720p vlogs sometimes)

My laptop’s color temperature was quite different from my LED monitors (which I use for my game artwork), or even my tablet.
So the game would look a bit different in color saturation’s on my laptop.
Strangely, Ubuntu’s sysinfo for the driver showed VESA, but xorg.conf showed AMD and amdcccle was also able to make on the fly changes.
It was evident that I had both the drivers, and some apps were not looking at the right place (especially while reporting).

Anyway, out of hunch I decided to drop the fglrx drivers and use the radeon only (which wasnt so stable for the card/ubuntu version back then)..

Did this:

$ sudo apt-get remove –purge fglrx fglRx_* fglrx-amdcccle* fglrx-dev* xorg-driver-fglrx
$ sudo apt-get install –reinstall xserver-xorg-video-ati xserver-xorg-video-radeon
$ sudo reboot


My Laptop Screen right now :)

My Laptop Screen right now 🙂

And after reboot, the color temp is quite cooler (although my laptop fan runs a bit more now),  my vlog 720p videos play without tear,  Audio of my ‘Altec Lansing’ speakers doesnt ‘tear’ on high volume (surprise!)  and  Ubuntu sysinfo shows “Gallium 0.4 on AMD PALM”  which according to this ( is the correct modesetting for HD6810 card 🙂

Let’s hope it works across VMs now 🙂

Have fun trying if you have the same/similar card (Disclaimer: I’m not responsible though :P)


October 28, 2011

Virtualization AMD-V on AMD E-350 Zacate

If you have a AMD Zacate processor based notebook ( Hp dm1, IBM x120e, Sony VaioYB ) and VirtualBox complains of AMD-V being unoperational.

The error on VirtualBox is something like:

VT-x/AMD-V hardware acceleration has been enabled, but is not operational. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot.


Go to BIOS setup and find a option that says “SVM support” and Enable it.

AMD-V Enable "Secure Virtual Machine" mode

SVM means “Secure Virtual Machine” support.

Update: If your VirtualBox freezes when installing 64 bit OS using AMD-V capabilities, it is a bug in Virtualbox and has been fixes in 4.1.2
If you’re using an LTS Ubuntu and installed VirtualBox from repos, then you probably have 3.1.6. Uninstall it and install the >4.1.2 deb available on

April 6, 2011

Wi-Fi on HP dm1

Filed under: GNU/Linux — krish @ 8:56 am
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Alright guys, so I got the HP dm1(AMD Fusion) and cancelled the Lenovo Thinkpad x120e that was ordered in US, for many strong reasons that I’ll blog up later.

The HP dm1 comes with Ralink wi-fi card which most of the current Linux distros do not identify out of the box as of now / end up probing the wrong driver.

This is how to get your wi-fi up on the hp dm1
(as well as other new laptops with Ralink cards; just get the correct driver that matches your card )
Note: This was done on Ubuntu 10.04 – 64bit

1. Update your distro. 10.04 needed update to newer kernel 2.6.30 and headers for drivers to compile
krish@shenron:~$ sudo apt-get upgrade

2. Check the model of your ralink card (Mine shows 539x series which is a Wi-Fi, Bluetooth Combo)
krish@shenron:~$ sudo lspci | grep -i 'network'
02:00.0 Network controller: RaLink Device 539f

3. Go to ralink website -> Sofware -> Linux and Download the driver that matches your card version.

4. Unzip the package
krish@shenron:~/Downloads$ unzip

5. Change configuration
krish@shenron:~/Downloads$ cd 2010_1216_RT5390_LinuxSTA_V2.4.0.4_WiFiBTCombo_DPO/os/linux/

krish@shenron:~/Downloads/2010_1216_RT5390_LinuxSTA_V2.4.0.4_WiFiBTCombo_DPO/os/linux$ sed -i 's/HAS_ANTENNA_DIVERSITY_SUPPORT=n/HAS_ANTENNA_DIVERSITY_SUPPORT=y/'

krish@shenron:~/Downloads/2010_1216_RT5390_LinuxSTA_V2.4.0.4_WiFiBTCombo_DPO/os/linux$ grep ANTENNA_DIVERSITY

6. Build
krish@shenron:~/Downloads/2010_1216_RT5390_LinuxSTA_V2.4.0.4_WiFiBTCombo_DPO/os/linux$ cd ../../

krish@shenron:~/Downloads/2010_1216_RT5390_LinuxSTA_V2.4.0.4_WiFiBTCombo_DPO$ sudo make

7. Install if Step 6 was successful with no errors; else start fixing your config again 🙂
krish@shenron:~/Downloads/2010_1216_RT5390_LinuxSTA_V2.4.0.4_WiFiBTCombo_DPO$ sudo make install

8. Make your correct card number to be probed ( Use your card model here, mine is rt5390sta )
krish@shenron:~$ sudo echo "rt5390sta" >> /etc/modules

9. Blacklist wrongly probed ralink drivers – Ubuntu 10.04 probed this bluetooth module
krish@shenron:~$ sudo echo "blacklist rt2800pci" >> /etc/modprobe.d/blacklist.conf

10. Reboot
krish@shenron:~$ sudo shutdown -r now "Yay!"

11. After the machine is up again, check for ra0 interface
krish@shenron:~$ sudo ifconfig ra0 | head -n2
[sudo] password for krish:
ra0 Link encap:Ethernet HWaddr 90:00:4e:1a:76:e6
inet addr: Bcast: Mask:

Wolah, you’re connected and free to move away from the computer table on to the couch for some lazy working style 😉

September 16, 2010

Overclocking Phenom II X2 550

Filed under: GNU/Linux — krish @ 4:07 am
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Alright, so we built our cloud testbed box with the sexy processor despite the whole world around us saying “Forget AMD, go for Intel”.

Here’s the configuration
Processor: AMD Phenom II X2 550 (darn, I did not find the black edition)
Motherboard: Gigabyte MA74GMT-S2
RAM: 4GB DDR3 (ripped off from a lenovo machine)
Harddisk: 500GB Seagate Barracudda 7200rpm

This was perfectly running stable @3.1Ghz until one day I noticed the OS boot time go drastically slow.
Lot of investigation on memory and cpu usage brought up that the CPU had defaulted to 800Mhz per core.
Over-clocking in the BIOS was just not helping (Tried till 3.8Ghz) ; the CPU would go back to 800Mhz once you exit the BIOS.

After experimenting virtually every setting in the BIOS for 3 days, including updating the BIOS to latest rev, I found that “AMD Cool and Quiet” setting had kicked in somehow !!!

Disabled “AMD Cool and Quiet” and set the CPU Clock to default speed and it finally is back running @3.1Ghz; Hurray!!!
I just hope I dont have to worry about the Temperature parameters 🙂

September 5, 2010

Memory Ganged vs Un-Ganged

Filed under: Gaming — krish @ 11:21 pm
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If you have noticed your BIOS report “Un-ganged Memory” and are worried if something’s wrong; dont be :)
Nothing’s wrong.

Know few things before deciding to change it over to “Ganged mode”:

It is AMD’s technique similar Nvidia’s Locked vs unlocked architecture.
Basically, it allows you to use your RAM in dual channel vs single channel.
Ganged = Dual channel mode for ram. All cores get access to 100% of the ram.
Unganged = Single channel. Each core gets access to a stick of ram.

Ganged and Un-ganged are both dual channel memory modes, as long as you are using pairs of RAM.
Ganged means you will run one large 128bit dual channel bus, and unganged means you will use 2x64bit dual channel bus.

Which is better depends on what apps you use. Heavy multitasking will benefit from un-ganged mode.
Gaming applications benefit from ganged mode.

In theory, the unganged mode is better as each core will get access to data quicker.
Un-ganged mode also allows you to control memory clocks independently.

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