From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Michael Buesch <mb@bu3sch.de>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: Powerbook shuts down hard when hot, patch found
Date: Sun, 30 Sep 2007 07:51:55 +1000 [thread overview]
Message-ID: <1191102715.28637.0.camel@pasglop> (raw)
In-Reply-To: <200709291322.59607.mb@bu3sch.de>
On Sat, 2007-09-29 at 13:22 +0200, Michael Buesch wrote:
> On Saturday 29 September 2007 13:06:59 Michael Buesch wrote:
> > > This is very strange... Can you try also clearing VGA_DDC_CLK_OUT_EN and
> > > VGA_DDC_DATA_OUT_EN and the same time and see if that helps ?
> >
> > It still triggers the bug then.
>
> I tried something else.
> I removed the write and only added a printk with a register read
> to print the contents (DDC REG IS 0x...) . This is the result:
>
> [ 0.431304] PCI: Enabling device 0000:00:10.0 (0006 -> 0007)
> [ 0.626866] radeonfb (0000:00:10.0): Invalid ROM signature 303 should be 0xaa55
> [ 0.626877] radeonfb: Retrieved PLL infos from Open Firmware
> [ 0.626887] radeonfb: Reference=27.00 MHz (RefDiv=12) Memory=203.00 Mhz, System=392.00 MHz
> [ 0.626897] radeonfb: PLL min 12000 max 35000
> [ 0.627194] DDC REG IS 0x00000303
> [ 0.763751] i2c-adapter i2c-2: unable to read EDID block.
> [ 0.983746] i2c-adapter i2c-2: unable to read EDID block.
> [ 1.203745] i2c-adapter i2c-2: unable to read EDID block.
> [ 1.280001] DDC REG IS 0x00000000
> [ 1.620189] ieee1394: Host added: ID:BUS[0-00:1023] GUID[001124fffed98036]
> [ 1.670984] radeonfb: Monitor 1 type LCD found
> [ 1.670992] radeonfb: EDID probed
> [ 1.670997] radeonfb: Monitor 2 type no found
> [ 1.671012] radeonfb: Using Firmware dividers 0x0002008e from PPLL 0
> [ 1.671075] radeonfb: Dynamic Clock Power Management enabled
> [ 1.712658] Console: switching to colour frame buffer device 160x53
> [ 1.735555] radeonfb: Backlight initialized (radeonbl0)
> [ 1.735746] radeonfb (0000:00:10.0): ATI Radeon NP
> [ 1.738776] Generic RTC Driver v1.07
> [ 1.738995] Macintosh non-volatile memory driver v1.1
> ...
>
> Note that the function is called twice. Is that correct?
Yes. That's expected, with different registers though.
I don't quite get what's going on. I'll have to figure that out with ATI
if they bother helping...
Ben.
next prev parent reply other threads:[~2007-09-29 21:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-28 21:32 Powerbook shuts down hard when hot, patch found Michael Buesch
2007-09-28 23:04 ` Benjamin Herrenschmidt
2007-09-29 11:06 ` Michael Buesch
2007-09-29 11:22 ` Michael Buesch
2007-09-29 21:51 ` Benjamin Herrenschmidt [this message]
2007-09-29 21:53 ` Michael Buesch
2007-09-29 22:19 ` Benjamin Herrenschmidt
2007-09-29 22:26 ` Michael Buesch
2007-09-29 22:49 ` Benjamin Herrenschmidt
2007-09-30 10:13 ` Michael Buesch
2007-09-30 10:16 ` Michael Buesch
2007-10-01 8:00 ` Michel Dänzer
2007-10-01 20:58 ` Michael Buesch
2007-10-02 6:43 ` Michel Dänzer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1191102715.28637.0.camel@pasglop \
--to=benh@kernel.crashing.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=mb@bu3sch.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).