[lm-sensors] sensors-detect changed screen's vertical rate

[lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

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cnM

Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Guenter Roeck]

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

> Hi Numan,

   Hi Jean,

Thank you for your concer on this problem and kindness.

> For the records, please also tell us:
> * Which version of sensors-detect you used?

Version that I used is:

libsensors4 1:3.3.0-4ubuntu1
lm-sensors 1:3.3.0-4ubuntu1

> * Did you leave the default answer to every question, or did you ask
>  for probing which was disabled by default?

I answered all questions to yes.

> I see you're using the radeon driver on a RV380 chip. Do I understand
> correctly that this is a laptop and the screen you're talking about is
> the laptop's own screen? Fujitsu-Siemens Amilo Pro V2045, right?

Yes, it is a laptop and I am talking about it's screen. It is a
Fujitsu-Siemens Amilo Pro V2045.

> It would be great if you could dig your logs for a dump of your EDID  _before_ the corruption. The radeon driver logs this
> to /var/log/Xorg.0.log. If you can't find that, it would be great to find another user with the same laptop who could provide > this dump.

Unfortunately, there is no dump of EDID in the Xorg.0.log. My screen
is a SAMSUNG LTN 154X3-L01.
Here is the Xorg.0.log output: http://pastebin.com/7Y2wRWpg
But, fortunately, I found some dump of EDID: http://pastebin.com/HDTG4T2W
There are 3 more of like this and they belong to same monitor, SAMSUNG
LTN 154X3-L01. They have same manufacturer, model, EDID version and
product year. All of this dump of EDID are exactly same.

> First run xrandr --verbose to have the detailed timings for 1280x1023, and then use --newmode with 1023 replaced by > >  800
I took your advice and gave xrandr --newmode "try" 68.9 1280 1296 1544
1408 800 1024 1027 1039 command ( replaced 1023 with 800) Now, it is
better. I mean before this command, I could not see the bottom of
applications if I used them maximized but now I can see a little bit
of bottom of applications.

> I'd be more interested in the output of i2cdetect for each but for now. Also I'm not sure what you were trying to achieve >with:

I thought i2cdump output would be usefull so I added them.
I loaded i2c-dev, eeprom and radeonfb modules than gave i2cdetect,
here is the output: http://pastebin.com/4fK1Y4P9

> I suspect you meant 0x50, not 0x60. Please try that and report. I would also need the (bogus) EDID dump from /var/log
> /Xorg.0.log.

Sorry, here is the result that you wanted:

sudo i2cdump 2 0x50
No size specified (using byte-data access)
Error: Could not set address to 0x50: Device or resource busy

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

> Some PMBus chips react very angry to commands like this, and end up
> clearing their configuration space to the default factory configuration.
> The usual result is that the affected board is dead. Maybe something
> similar happened here.
>
> Guenter

Hi Guenter,

Thank you for your interest on my problem.
I gave that command after the problem accured just to provide
information that can be useful to solve the problem.

Sincerely,
Numan

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

2012/4/6 Jean Delvare <khali@linux-fr.org>:
> Sorry for the late reply, I have a lot of work this week.

It is ok, take your time:)

> I presume you do not remember which ones defaulted to "no" and you had
> to say "yes" explicitly?

Yes, that is what I did.

> It's strange, I do see it in mine with the radeon driver:
> Maybe there is a verbosity level to set somewhere, my X server is
> started with -verbose, maybe you have to do the same. Or

I stopped X and gave "exec /usr/bin/X -nolisten tcp "$@" -verbose 20
2> /tmp/startx.log" command but still there is no dump of EDID.

> Good, so at least we have a reference. Now we need to find out which
> bytes in your own EDID have been altered.
> You also have to offset the 3 other vertical timings:
> $ xrandr --newmode "try" 68.94 1280 1296 1344 1408 800 801 804 816 -HSync -VSync

Now I get what you wanted me to do. I tried the command above but
resolution looks bad. Icons, fonts etc. looks blur and bigger.

> That's because you have loaded the eeprom driver. Either provide the
> contents of file /sys/bus/i2c/devices/i2c-2/2-0050/eeprom or unload the
> eeprom driver and provide the output of the i2cdump command above.

Sorry, my mistake. This is the output: http://pastebin.com/aSUSR7wX

Best regards,
Numan

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

> Note the XX in the dump, which means an error occurred on the bus.
> Please check your kernel logs to see if there is an error message
> corresponding to this failure. If the I2C bus is unreliable, this could
> explain in part the trouble you had.

I read /var/log/dmesg.log and kern.log but I could not see an error or
warning related to anything or I do not have the capability to see.

> Comparing the original EDID with your tampered copy shows 6 bytes that
> are now 0xff instead of the value they used to hold:
>
> 0x2b: 0x01 -> 0xff
> 0x2e: 0x01 -> 0xff
> 0x2f: 0x01 -> 0xff
> 0x3b: 0x20 -> 0xff
> 0x3f: 0x30 -> 0xff
> 0x78: 0x33 -> 0xff
>
> FWIW, this doesn't correspond to a specific pattern for sensors-detect,
> which accesses the following offsets for probing this specific address:
> 0x00-0x07 and 0x3d-0x3f. So I still have no idea what happened and why.

Maybe, this is a hardware problem and is a coincidence so that the
time I use sensors-detect, the screen is "broken".

> Assuming your EDID EEPROM is writable, the following commands (as root)
> should restore its original state:
>
> # rmmod eeprom
> # i2cset -y 2 0x50 0x2b 0x01 b
> # i2cset -y 2 0x50 0x2e 0x01 b
> # i2cset -y 2 0x50 0x2f 0x01 b
> # i2cset -y 2 0x50 0x3b 0x20 b
> # i2cset -y 2 0x50 0x3f 0x30 b
> # i2cset -y 2 0x50 0x78 0x33 b
>
> You can check with i2cdump afterward. I'd even check after fixing the
> first byte, as there is no point in going on if the first write failed

Those commands worked without any error, I checked with i2cdump after
first and last command. Rebooted but it is still using 1280x1023.

I tried "radeon.modeset=0" parameter in grub and looked at
/var/log/Xorg.0.log, it shows that

II) RADEON(0): Panel Size from BIOS: 1280x1023
[    16.704] (II) RADEON(0): BIOS provided dividers will be used.
(WW) RADEON(0): LVDS Info:
XRes: 1280, YRes: 1023, DotClock: 68940
HBlank: 128, HOverPlus: 16, HSyncWidth: 248
VBlank: 16, VOverPlus: 1, VSyncWidth: 3

and with radeon enabled

[   14.238369] [drm] Panel Size 1280x1023
16.560] (II) RADEON(0): Output LVDS using initial mode 1280x1023

If I use xrandr --outpur LVDS --mode "try", /var/log/Xorg.0.log says

[  1644.860] (II) RADEON(0): Allocate new frame buffer 1280x800 stride 1280
[  1644.860] (II) RADEON(0): VRAM usage limit set to 50547K

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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b3Jz

Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

> What did the i2cdump outputs look like? Did you see the offending
> offset values change from 0xff to the values you passed on the command
> line?
> Did you try i2cdump again after rebooting, to make sure the writes
> stuck?

Yes, I saw them changed and after rebooted I gave commands again.
Last i2cdump output: http://pastebin.com/pyC0j5ug
It seems that some values returned ff again.

> Did you only reboot the machine? Please try cold booting it, even
> remove the battery and unplug the power cord for 10 minutes if needed.
> Maybe the BIOS only reads the EDID once at cold boot.

I had just rebooted machine but now I did cold boot by removing
battery and unpluging power cord.

> BTW, when the problem happened originally, did it happen while
> sensors-detect was running, or after next reboot, or after next cold
> boot?

After next cold boot, the problem happaned. When sensors-detect
finished, I hust read some .pdf files then shut the computer down. The
next boot was after about 8 hours later.

Best regards,
Numan

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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bS1zZW5zb3Jz

Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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bG0tc2Vuc29ycw=

Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

>> Indeed, two of the 6 writes stuck, but the ones at 0x2b and 0x2f did
>> not. Can you just try these two again and see if it works better this
>> time (after a cold boot)?
>
> Hm, I meant: at 0x3b and 0x3f.

I gave related commands and after that made a cold boot but resolution
did not changed.
New i2cdump: http://pastebin.com/KExUrapp

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lm-sensors@lm-sensors.org
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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

> i2c-2 is precisely the I2C bus where your EDID is and where the problem
> happened. AFAIK hw_i2c is off by default, so please check why and how
> it was enabled. Then you may try to turn if off to force software
> operation of the I2C bus (i2cdetect -l should show that), and then do
> the i2cset commands again and see if it works. Again my hope level is
> low but I think it is worth trying.
>
> --
> Jean Delvare

modinfo -p radeon shows that:
hw_i2c:hw i2c engine enable (0 = disable) (int)

So I wrote radeon_hw_i2c=0 to grub command line, then gave the i2cset
commands, but it did not work. I also tried radeon.modeset=0 to find
out whether the culprit radeon's itself, this also did not work.

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

> I hope you did not do that but rather radeon.hw_i2c=0. Did you check
> with "i2cdetect -l" that hw_i2c wasn't used?

I actually wrote radeon.hw_i2c=0 but wrote wrongly in e-mail.
Although I used redeon.hw_i2c=0 oarameter, i2cdetect -l shows

i2c-2	i2c       	Radeon i2c hw bus MM_I2C        	I2C adapter

I read xorg.0.log and dmesg.log to check that whether radeon.hw_i2c=0
works or not, there was not any lien that complaining radeon.hw_i2c=0
was not working. So I presumed it worked.

> Meanwhile I found a post from someone who had the same problem:
> http://lists.freedesktop.org/archives/xorg/2011-January/052239.html
>
> This would confirm that sensors-detect was only the trigger rather than
> the root cause of the corruption. I'll talk to the radeon driver
> maintainer on Tuesday.
>
> --
> Jean Delvare

Thank you Jean, I appreciate your help.

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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Zm8vbG0tc2Vuc29ycw=

Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

> You can check the value of /sys/module/radeon/parameters/hw_i2c.
> Jean Delvare

cat /sys/module/radeon/parameters/hw_i2c
0
So it works. Thank you.

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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bG0tc2Vuc29ycw=

Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Jean Delvare]

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Re: [lm-sensors] sensors-detect changed screen's vertical rate

[Numan DEMİRDÖĞEN]

> Scratch this, I discussed with Alex Deucher and he explained that there
> is no possibility to access the MM i2c bus with software bit-banging,
> the hardware engine is the only way to go and this is why the hw_i2c
> option has no effect on this bus.
>
> Unfortunately he didn't have any explanation for what happened. All he
> could suggest was that maybe some EEPROM cells went dead when the
> problem happened, and that's why we can't write the proper values back.
> This is indeed a possibility, which unfortunately means there's nothing
> we can do to restore your EDID. Sorry :(
>
> --
> Jean Delvare

Hi Jean,

If that is the case, I will try to get use to use laptop in the
current condition.

I thank you very much for all of your effort and help.

Yours sincerely,
Numan

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