yashsingh1/xdaforums huggingface dataset:
[Desire General] andycted:
It should also make sense that A2SD and Dalvik Cache to SD even more, will impact the test, no matter how much you close and kill processes before running the test.

For 720p purposes, I'd like to know if anyone who had problems with the stuttering (not low fps, but the frozen frame now and then), solved this with an upgrade in class and if it's really needed a class 10. Again, A2SD+ can be a factor in this.

Anyway, I've tried a cheap sandisk class2 16GB:

- first run, everything on, auto screen off: read 2MBit, write 3Mbit -> class 2

- second run, airplane on, auto screen off: same

- third run, killed everything, screen always on: read 6Mbit, write 3Mbit -> class 2

- fourth run, as above: same results

The interesting bit is that my transcend class 6, 8GB one, had very very similar results, with bumps to 4Mbit write right after boot, when killing everything...

That's what makes me hesitate to buy a class 10 card. Will the actual usage speed improve so much to justify the cost, especially on 720p ?
[Desire General] paulruk:
I've had stuttering with video and my class 6 8gb transcend. I never use to, I blame 2.2

For that too. So much for a speed improvement , only thing that feels.quicker in 2.2 are app installs.
[Desire General] tifosi256:
For reference, if anyone is interested:

HTC Desire, unbranded, generic Froyo 2.2 ROM with apps on the SD card as well

Sandisk 32GB Class 2 card shows:

Write speed: 4mb/s

Read speed: 2mb/s

Measured as a Class4 card.
[Desire General] SimonVT:
removed
[Desire General] vasra:
Kingston 16GB MICROSDHC CLASS 2:

Write 5MB/s

Read 16MB/s

Using: Galaxy S

Buffer: 1MB
[Desire General] streetdaddy:
Samsung 8gb class 6

Write 2mb

Read 6mb

I'm running a2sd+ though...
[Desire General] Max BrainBox:
Don't defrag non-mechanical memory devices

1 - you won't see (or measure) any difference

2 - the memory cells have a limited # of write cycles, which will be seriously impacted by useless defragging
[Desire General] koider:
I had the same problem as the OP (slow SD since Froyo upgrade causing music dropouts). Here's my collection of links to related posts, unfortunately I haven't found a solution except using a non-Sense ROM (e.g. Cyanogenmod).

http://xdaforums.com/showthread.php?t=781606#9

http://xdaforums.com/showthread.php?t=743792

http://xdaforums.com/showthread.php?t=778748

http://xdaforums.com/showthread.php?t=723073

I think it's kernel-related; I tried running the kernel from a Froyo/Sense ROM with the rest of an Eclair/Sense ROM and the SD card read speed was low (couldn't measure the speed with the SD Card Speed Test app because the touchscreen didn't work but I was able to adb in and use "dd").
[Desire General] koider:
Since a number of us are experiencing this problem I think it's worth us all reporting it to HTC support. If they know that a lot of people are seeing much worse SD card speeds in 2.2 than in 2.1 then they're more likely to fix it in a future update.

I've reported it to them already ;)
[Desire General] Dragooon123:
Read 10MB/sec

Write 5MB/sec

It rated it as a class 4 card(Which it is), I'm quite surprised at that performance since I bought it for hardly 5$.
[Desire General] koider:
What version of Android do you have on your phone? I think that you can find this out in Settings->About Phone->Software Information.
[Desire General] Dragooon123:
DeFroST 4.9, running Froyo(2.2).
[Desire General] koider:
Thanks.

That fits with what I've observed so far - you're running a non-Sense ROM and your SD card speeds are fast. I'm not aware of anyone who is running a Froyo Sense ROM (i.e. HTC kernel 2.6.32.15) and is getting good SD card read speeds (more than 6MB/s).
[Desire General] ZigmaDK:
I have the same behaviour.

My 8GB Transcend Class 6 card gives me 2-3MB write speeds and 3-4 MB read speeds MAX!

SD Card Speed Tester reports my card as a class 2 :(
[Desire General] Jamin_1:
Write 5MB/s

Read 6MB/s

Desire is running with LeeDroid 2. 1a(with Sense!) with A2SD+ and I bought a class 4 SD-card.

So I can't be worry ;-)
[Desire General] koider:
I get similar speeds in 2.2 (Froyo) Sense ROMs, but I get more than 10MB/s read in Cyanogenmod, OpenDesire and 2.1 (Eclair) Sense ROMs.

If you play music and do something that writes to the SD card at the same time does the music stutter? And if you record video at 720p is it smooth or do you see stutters every few seconds?

BTW HTC have just released kernel source for Froyo which might enable someone to fix this :-)
[Desire General] Jamin_1:
Hey, yes you're right.

For example when I install a program the music is breaking for a short time. I thought this is normal :O

That is a big difference between with and without sense!

But I'm loving sense! It's so much useful, helpful and looks perfect.

About what kernel are you talking?
[Desire General] koider:
Yes, I like sense too. In the original ROM that came on my phone, i.e. Android 2.1 (Eclair) with Sense, SD card reading was fast and the music didn't break up when you installed programs etc.

"HTC Desire - Froyo MR - 2.6.32 kernel source code" on http://developer.htc.com/. This is the source code for the kernel that is used in Froyo with Sense ROMs. Now that the source code has been released developers can look at it, and compare it with the source code for the kernel used in non-Sense Froyo ROMs and the kernel used in the Eclair+Froyo ROM and try to work out what causes the SD card problems. They can then try to make a kernel based on the code HTC just released, but with a fix for the SD card problem. I might have a go at this myself but I won't have time to for the next fortnight. I'm also not an expert in this area; I can program C and Java but I'm a newbie to Linux kernel programming.

The above is all assuming that it is actually the kernel that is causing the problem, I'm 90%+ certain that it is though based on my experiments with an Eclair ROM with the Froyo kernel.
[Desire General] Deathman20:
Well I had a TopRam Class 6 card in my Desire and ran some speed tests going anywhere between a Class 2 and Class 4 most of the time. Rather upset about it did some searching got a Kingston Class 4. It does better than the class 6 in almost every catagory.

As well reads and writes are faster on the PC vs this test on the phone.
[Desire General] Jamin_1:
"HTC Desire - Froyo MR - 2.6.32 kernel source code" on http://developer.htc.com/. This is the source code for the kernel that is used in Froyo with Sense ROMs. Now that the source code has been released developers can look at it, and compare it with the source code for the kernel used in non-Sense Froyo ROMs and the kernel used in the Eclair+Froyo ROM and try to work out what causes the SD card problems. They can then try to make a kernel based on the code HTC just released, but with a fix for the SD card problem. I might have a go at this myself but I won't have time to for the next fortnight. I'm also not an expert in this area; I can program C and Java but I'm a newbie to Linux kernel programming.

The above is all assuming that it is actually the kernel that is causing the problem, I'm 90%+ certain that it is though based on my experiments with an Eclair ROM with the Froyo kernel.[/QUOTE]

Thank you for the little guide.

I think so too and will waiting and watching for it.

Here look what "richardtrip" had posted in the LeeDroid 2.1a Forum:

http://xdaforums.com/showthread.php?t=801435

I´m really a newbie all about Kernels in Android Devices.

Is it possible to change/tune a Kernel when my Desire get s-off?

I looking forward to set my phone s-off at friday :)
[Desire General] paulruk:
Just bought the same Kingston card for my Desire running 2.2, to replace my 8gb transcend.

Has improved slightly but nowhere near your read speed

Write 6mb/s

Read 5mb/s

Buffer: 1mb

Never seen anything that writes faster than it reads. Music still cuts out when other apps are accessing sd card, although perhaps not as bad as with the transcend 8gb. Lets hope they sort this out for the next update.
[Desire General] GReaper:
Kingston 8GB Class 4

Write 5 MBps

Read 4 MBps

SanDisk Mobile Ultra 16GB Class 4

Write 4 MBps

Read 6 MBps

This card has been tested on my computer with similary settings, with these results:

Write 8 MBps

Read 14 MBps

Running on stock Desire 2.2
[Desire General] GReaper:
Using the info from my test here

I would say that SD Card Speed Test is almost useless. I therefore recommend using J Disk Benchmark instead. It's the only reliable speedtest that iv'e found.
[Desire General] bunnybash:
i have a Class 4 16gb from kingston and get

15.4mbps read speed.... that is strange to have such a high
[Desire General] Jamin_1:
What for a Rom is running on your device?
[Desire General] rori~:
*lol..are you sure?

see my screenshot
[Desire General] cowlag:
Need J Disk Benchmark SD SPeed test

I am trying to find the J Disk Benchmark app the free version no longer is posted does anyone still have the free version by chance... trying to do an SD speed test to see how accurate the Sst SD Card Speed Test app is vs the J Disk one is but have not had any luck finding it...
[Desire General] cowlag:
I think the J Android hacker's system tool includes it along with other things I will try that...
[Desire General] ebi023:
jdisk benchmark is better to check sd card speed
[Desire General] cowlag:
If they still had the free version around or if I could find it I would use it, do you have a link?
[Desire General] Scudderb:
EDIT

:

FOUND IT...it is now a paid app called "SD Card Tester" I thought there was a free one still in the Market...

S

Does anyone know where I can get this app?? I have looked at the Market and cannot find. Is it no longer available??

THANKS!
[Desire General] adixme:
I have a kingston 8gb class 2 showing horrible write speeds of 2mb/sec is it a fake ?
[Desire General] Evilev0:
From what I have learned the class number = The data rate read speed of the card.. I.e Class 2 =2mb Class 4 =4mb ...ect.
[Desire General] adz63:
that app is complete and utter useless right ? ok i have an 8gb class2 that came with my desire it does not say kingston or any make at all

and i run 4 tests and heres what they said

test 1 write 7mb read 22mb class 6

test 2 " " 8mb " " 25mb class unknown

test 3 " " 9mb " " 25mb class unknown

test 4 " " 10mb " " 25mb class 10

does that just prove that every test taken is absolute rubbish
[Desire General] tetterismixalis:
try to kill all your apps first becouse something might use your card
[Desire General] adz63:
all apps killed and exactly the same results
[Desire General] th3:
It refers to the minimum level for sustained, sequential write speed of large block transfers of the device. Class 2 has to be no lower than 2MB/s in such tests. It can be higher at different levels. Many higher class card do get passed on at a lower class.

I'll attach the free app on here as soon as I have access to a PC.

------------------------------

- Sent via HTC Desire -
[Desire General] th3:
That alone does not make that app rubbish ;)

Check SDcard Tools for the exact make and model of your card. I doubt highly that it is class 2. The sustained sequential write speed is what will show you which class it really is, no matter what the manufacturer sells it as.

------------------------------

- Sent via HTC Desire -
[Desire General] OpusX11:
Antutu from the market also does tests. I got and 8gb class 10 patriot card but two different benchmarking apps are showing horrible write rates: 2.5 while the read rate is around 12
[Desire General] Terepin:
A-DATA 16GB class 6:

- read: 14.3 MB/s

- write: 8.4 MB/s

Not bad.
[Desire General] Majkel_M:
Hi, since about a week I have a brand new HTC Desire. Prevoiusly I had few SymbianOS phones and iPhone (never again :) ). Phone works like a charm, much better than my iP 3Gs. But...

... I'm having some issues with microSDHC card. I bought in a local store Kingston 16GB Class4 card (so I'm sure it's not a fake one) and what I quickly noticed its slower than card which I get with my Desire - Samsung 4GB Class2.

It was easy to notice while watching videos recorded by Desire's cam. With new card videos were not played so smooth as it used to on 4GB, orginal card.

I've performed multiply tests using anTuTu and SD Card Speed Test, results are as follows:

Note: All tests were performed on a card that's completely empty.

Kingston 16GB Class4

Antutu

Write: 3,9 MB/s

Read: 2,9 MB/s

SD Card Speed Test

Write: 4 MB/s

Read: 3 MB/s

Connected via USB card reader - tested via ATTO Disk Benchmark (Win7):

Write 4-5 MB/s

Read: 12-13MB

Now, orginal SD card (Samsung 4GB Class2) that I get with phone:

Antutu

Write: 3,9 MB/s

Read: 4,0 MB/s

SD Card Speed Test

Write: 4 MB/s

Read: 4 MB/s

Connected via USB card reader - tested via ATTO Disk Benchmark:

Write: 4-5 MB/s

Read: 12-13MB

And last one, I had also old 2GB card, old one, that even hasn't got Class defined.

Antutu

Write: 7.4 MB/s

Read: 4 MB/s

SD Card Speed Test

Write: 7 MB/s

Read: 4 MB/s

Connected via USB card reader - tested via ATTO Disk Benchmark:

Write: 7 MB/s

Read: 18MB

I've tried formatting this new 16 GB card few times, from Windows, from Phone - but this doesn't solve the problem at all. What is pretty surrpising, 4 class card behaves like class2. While doing test I tried killing all background, but results - were the same.

My Desire has android 2.2 - stock. Phone has not been rooted. Can anyone tell me why write speed is higher than read speed? Is there any fix for this?
[Desire General] th3:
Your read speed is really low for large block, sequential transfers. Slower than my Class 2 (double yours). Videoing involves such a file, but your card reader results are fine. Looks like a ROM/kernel problem.

------------------------------

- Sent via HTC Desire -
[Desire General] Majkel_M:
Yesterday, I did HardReset, however it's now even worse.

SD Card Speed Test on empty Kingston 16GB Class4 says

Write: 3 MB/s

Read: 2 MB/s

:(
[Desire General] frankoid:
HTC reduced the readahead from 128K to 4K in their Froyo kernel, which results in poor read speeds. There is a fix for this though - see http://xdaforums.com/showthread.php?t=815557. That fix is already incorporated into a lot of custom ROMs, and the first post in my thread shows you how to tell whether you need the fix. If you are going to apply the fix yourself rather than use a ROM that already has the fix then the init.rc method described at http://xdaforums.com/showthread.php?p=9026201#post9026201 is best because it doesn't involve changing your kernel (although applying the init.rc fix does require some "rom cooking" knowledge, e.g. how to unpack/repack boot.img). Note that this fix only applies to Sense ROMs, not AOSP-based ROMs like CyanogenMod and Oxygen - AOSP-based ROMs all already have 128K readahead.

There also seems to be an incompatibility between some Kingston cards and the Desire that results in poor performance. I don't know much about this though because I don't have a Kingston microSD.
[Desire General] Majkel_M:
frankoid, really appreciate for your help, however I'm newbie in Android OS (got HTC Desire since a week) so I dont exactly know what staps should I take to fix it.

I would be truly grateful when some1 could describe me what should I do.
[Desire General] frankoid:
To fix the problem you need to root it and then install a custom ROM containing the fix. There is a risk that you could brick your phone when rooting it so be careful and make sure that you understand the instructions you are following.

First, go to Settings > About Phone > Software Information and note down the Baseband version, the Build number and the Software number shown there. They may come in handy if something goes wrong or if you want to unroot.

Read this guide to rooting and follow the instructions there to root your phone. I have uploaded the ROM I use to multiupload, download frankoid_2.29_r3.zip from http://www.multiupload.com/BCZT1R7U5Y and follow the instructions in the rooting guide to install it. Make sure that you take a nandroid backup as per the instructions; it's also a good idea to copy the nandroid backup from your SD card to your computer just in case something happens to your SD card. Finally download radio 32.54.00.32U_5.14.05.17 from here and install it (again using the instructions in the rooting guide).

After doing the above you should have exactly the same system software on your phone as I do and good SD card performance :). I'm afraid I might not have time to help you personally if you have problems but hopefully you should be able to find help on these forums.

In case anyone is interested in exactly what's in frankoid_2.29_r3.zip here's the changelog (i.e. this is what I did to make it):
[Click Themes and Apps] djcrajiee:
hello all, I posted this also in android development under themes but havent gotten a response plus it is for the tattoo so i guess i'll post here as well?

I'm looking for a shaded taskbar or status bar. all in all i would really like to have the top bar where the time, battery, signal, notifications bar shaded plus the pull down menu background shaded to around 50% transparency. I'm currently on [ROM] fyodor FroYo AOSP Tattoo v0.7.2c (Optimized ADWLauncher for QVGA) so it is on 2.2 but i cant seem to find any working mods for this. If anyone knows a simple way to do this (via apk or flash) please let me know! ive been searching for 2 nights to no avail!

PS I found this mod online but i cant seem to get it to work... the file is attached to my other post here http://xdaforums.com/showthread.php?t=765507

thanks in advance
[Click Themes and Apps] tbo-art:
I think that the size of the statusbar in that mod are to high. I can try something. I let you know when it work.

Tbo-art
[Galaxy S I9000 Q&A, Help & Troubleshooting] romhunter:
Hi all,

Got the Galaxy S for a month, pretty happy with it. Yesterday, the brightness suddenly gone up. The worst part is the display lost the gradient scaling and it is replaced by colour bands!

Apps like the stock video player for example. Before the video is played, you can see the grey control bar at the bottom covers by a lot of colour bands. The colour of the movie is all washed out as if you were playing it in 8 bit colour mode. Where the same avi played okay before, crystal clear and colour was rich.

Same thing with the charging screen while the phone is off. You can see the colour bands on the grey area of the shadow of the green battery. Just wondering if anyone has the same problem?

Cheers!
[Galaxy S I9000 Q&A, Help & Troubleshooting] WhatToDo:
Factory reset :d
[Galaxy S I9000 Q&A, Help & Troubleshooting] romhunter:
Tried all that full factory wipe, data reset, flash to different rom. Nothing works :(
[Galaxy S I9000 Q&A, Help & Troubleshooting] Fatherboard:
Then your device's probably faulty. replace it.
[Galaxy S I9000 Q&A, Help & Troubleshooting] romhunter:
Pretty certain it is. I took a screenshot of the video player and it looks fine but on the screen, you can still see those colour bands meters away.

I guess this indicates the LCD is faulty.
[Galaxy S I9000 Q&A, Help & Troubleshooting] evil-doer:
The galaxy s has no LCD its LED :P

Ive noticed when you slide down that tray from the top, when closing it mine has MANY TIMES switched to full brightness. But simply tapping the brightness button on the multi widget thingy makes it go back to how I want.
[Galaxy S I9000 Q&A, Help & Troubleshooting] talboy:
Thats because you can adjust the brightness by sliding your finger accross the notification bar.... doesnt work if you have auto brightness ticked...
[Galaxy S I9000 Q&A, Help & Troubleshooting] wavemechanic:
I have auto brightness ticked, sliding still works for me

Standard rom btw...
[Galaxy S I9000 Q&A, Help & Troubleshooting] radat:
Hi I have the exact same problem! But I didn't notice it before now wen I saw this thread. But all the colours are just fine when I play a vid, it's just the grey controlbar that is by many stripes of different colours, looks like 8bit colour. But when the vid starts playing its just fine, because it gets transparent. Should I get this phone changed, have just had it a couple of weeks.
[Galaxy S I9000 Q&A, Help & Troubleshooting] romhunter:
Hi Radat,

I posted more info in the other forum including some screenshots. http://forums.whirlpool.net.au/forum-replies.cfm?t=1520586

Hope yours okay. I am going to call Samsung tomorrow.
[Galaxy S I9000 Q&A, Help & Troubleshooting] miki4242:
romhunter,

yup, saw the screenshots, looks like quantization problem i.e. that colours are using fewer bits than normal. For example, RGB screen might use 24 bits per pixel, 8 bits per r/g/b colour, the screenshots seem to suggest only 5 or 6 bits per colour.

Hopefully this is just a software glitch, though you said you already tried factory reset / wipe, could it be a loose cable wire somewhere or maybe a problem with the screen to mainboard connector?
[Galaxy S I9000 Q&A, Help & Troubleshooting] evil-doer:
awesome. theres so many little shortcuts like this ive yet to learn. thanks
[Galaxy S I9000 Q&A, Help & Troubleshooting] radat:
On my sgs, there is a green colour attached to to the grey colours, I can see it really good when using Screen test app on the gray scale screen, all grey is sort of green!
[Galaxy S I9000 Q&A, Help & Troubleshooting] AnnihilatorSC:
Just got a brand new device. Used it for about an hour, then the exact same thing happened - out of the blue.

Any possible home-front solutions? Having to take it to be serviced is a PITA for me ATM.
[Galaxy S I9000 Q&A, Help & Troubleshooting] ssj4Gogeta1:
Mine definitely seems to have banding in the video player control pane before the video playback starts. Can someone please post a screenshot of how it should be? I haven't seen the banding issue anywhere else except the battery charging indicator when charging the phone when it's turned off. And as far as I remember they were always like that.

So can someone please post a screenshot of how it should be for me to compare.
[Galaxy S I9000 Q&A, Help & Troubleshooting] victor79:
I have the same problem appeared after upgrading to Froyo. Brightness increased (even it is high in the lowest setting) and color saturation also increased. As a result, i see bandings or lines where a color gradient exist. I added an example photo from "Samsung Apps" page. You can easily see bandings on the bottom. I see such things in a PC screen if color adjustment is not optimum. So there must be a way to adjust screen saturation and brightness by a software through registry i think. It seems like a software problem. I think it is a very rare problem, i found few people on the web complaining about it. Mostly HTC Desire, which use also Samsung Amoled screen, users complaining about it.

I did everything said on forums to solve it but no way. I flashed many different roms both eclair and froyo, use a software given in HTC forums to change RGB color, changed color settings through video player etc. Nothing worked. Please help
[Galaxy S I9000 Q&A, Help & Troubleshooting] ll_l_x_l_ll:
I looked at ur pic. I honestly dont see any problem with it. What is this banding ur talking about?
[Galaxy S I9000 Q&A, Help & Troubleshooting] victor79:
Bottom of the screen, around "2010 Samsungs Electronics". This part should be a smooth color transition from blue to transparent but there are circular lines between colors. Is your screen the same.
[Galaxy S I9000 Q&A, Help & Troubleshooting] victor79:
Another example. The one on the phone looks white on the upper part where a color transition from dark to light black exist and there are visible lines. But normally it was looking like the other picture (taken from notebook screen) before this problem
[Galaxy S I9000 Q&A, Help & Troubleshooting] compuse:
ah on that screen i already see 8 shades of blue, most be around 4k colors .. bummer though, it's normally a software problem, doubt that a conector has come loose. (but possible if it's a pimped up composite plug with Y/Pr/Pb, .. eh still impossible cos it's getting decoded before that)
[Galaxy S I9000 Q&A, Help & Troubleshooting] victor79:
I just unplugged the screen connection from the board and plugged again, no change. It is not a loose connection problem unfortunately