[Bug 60674] New: linux 3.10.x RV740 (Radeon HD 4770) display problem

[Bug 60674] New: linux 3.10.x RV740 (Radeon HD 4770) display problem

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=60674

            Bug ID: 60674
           Summary: linux 3.10.x RV740 (Radeon HD 4770) display problem
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.10
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: yg.do@sfr.fr
        Regression: No

Created attachment 107073
  --> https://bugzilla.kernel.org/attachment.cgi?id=107073&action=edit
Screenshot with kernel 3.10 (display BUG)

Description:
Hard to describe… It seems that fonts don’t get displayed. Seeing the
screenshots, I’m not sure it is the only problem, though… (see icons for
example)
Linux console is OK. E17 is OK.

Additional info:
* OS: up-to-date Arch Linux
* current (working kernel): 3.9.9
* tested non-working kernels: 3.10.2 and 3.10.3

Steps to reproduce:
* upgrade kernel,
* get this: [attached screenshot]

As you can see, Enlightenment17 has no problem for some reason. However, all
other applications I tried were displayed like the screenshot: Firefox,
Thunderbird, Geany… and SLIM (the display manager)!

On the login screen for example, I can enter my login name, but no text is
shown on screen; it lets me login though.

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=60674

--- Comment #1 from Yves G. (theYinYeti) <yg.do@sfr.fr> ---
Created attachment 107074
  --> https://bugzilla.kernel.org/attachment.cgi?id=107074&action=edit
For comparison, same screenshot with kernel 3.9.

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

Alex Deucher <alexdeucher@gmail.com> changed:

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                 CC|                            |alexdeucher@gmail.com

--- Comment #2 from Alex Deucher <alexdeucher@gmail.com> ---
Just to be sure, is the only component you changed the kernel (i.e., you didn't
change the mesa version as well)?  If so, can you bisect the kernel?

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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nucrap@hotmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |nucrap@hotmail.com

--- Comment #3 from nucrap@hotmail.com ---
Same issue here. Very many Radeon HD 4770 users are experiencing it:
https://bbs.archlinux.org/viewtopic.php?id=167248

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

--- Comment #4 from Alex Deucher <alexdeucher@gmail.com> ---
This is probably a bug in the mesa or ddx driver due to some feature that
requires a newer kernel and thus is only enabled on newer kernels.  Can you
bisect?

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

--- Comment #5 from nucrap@hotmail.com ---
Indeed downgrading to kernel 3.9.9 doesn't solve the issue for me.. will play
with mesa now

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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--- Comment #6 from nucrap@hotmail.com ---
Ah, sorry! Downgrading to kernel 3.9.9 does solve the issue! SDDM (my login
manager) still flickers but this seems to be Qt5 related. Really sorry, ignore
my previous comment!

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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--- Comment #7 from nucrap@hotmail.com ---
I have taken the time, read some how-to's and bisected the kernel. I have
managed narrow down the number responsible commits to 8.

Unfortunately out of some reason Xorg sincerely broke on my system (with only
two bisecting steps left -_-'): When trying to launch the X server e.g. via
'startx' the screen just gets black and after some long time it crashes with
the warning: "No protocol specified". Although I can't explain this, it must
have been the result of the corrupted kernel code while I was testing the
bisected kernels.

So this left me with a broken system, but I hope it will be of some help for
solving the bug and won't fall on deaf ears.
Here's the current output of 'git bisect visualize':
https://gist.github.com/Nuc1eoN/6224207

best regards
Philip

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

--- Comment #8 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 107198
  --> https://bugzilla.kernel.org/attachment.cgi?id=107198&action=edit
possible fix

This patch should fix it.

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

--- Comment #9 from Yves G. (theYinYeti) <yg.do@sfr.fr> ---
Sorry for the long time without an answer; I was on holidays. Just to be clear:
the kernel (and associated packages for my setup) is the only component that
changes; here’s the exact list: linux, linux-headers, spl-utils, spl,
zfs-utils, zfs, virtualbox-host-modules.

I don’t know how to “bissect” and all this stuf. However, I will try the patch
suggested by Alex; thanks, by the way :)

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

--- Comment #10 from nucrap@hotmail.com ---
Hey Alex, I was able to resolve my Xorg issue (it was due to no disk space
being left on the partition :s) and could fully test your patch.
I can gladly confirm that it fully fixes the issue!

Thanks for your great work at the Radeon open source drivers!

regards,
Philip

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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Ondřej Svoboda <ondrej@svobodasoft.cz> changed:

           What    |Removed                     |Added
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                 CC|                            |ondrej@svobodasoft.cz

--- Comment #11 from Ondřej Svoboda <ondrej@svobodasoft.cz> ---
Thank you guys for solving this one out! I can confirm the patch works; I
applied it to an almost vanilla Arch kernel (package linux 3.10.7-1) and the
driver now works with my HD 4770 beautifully, Gtk applications are drawn
correctly.

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

Dave <systemdkiosk@yopmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |systemdkiosk@yopmail.com

--- Comment #12 from Dave <systemdkiosk@yopmail.com> ---
We encountered such visual issues on a different, older GPU:

RV350 (Shivah) on AGP bus
xorg-xserver 1.14.2-2
xf86-video-ati 1.7.2.0-1
qt4 4.8.5-1
kernel 3.10.6-2
32-bit Arch Linux, up-to-date

Similar screenshots and reports,
https://bbs.archlinux.org/viewtopic.php?id=167248

For us, switching the xorg.conf AccelMethod from EXA to glamor caused the mess.
No problems occur under EXA.

GTK+ and XUL apps suffer far more than Qt. KDE desktop and apps render OK. We
get a random dead blank screen on likely hardware register or interrupt issues,
but only in glamor mode. Boxes run stable EXA indefinitely.

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

--- Comment #13 from Michel Dänzer <michel@daenzer.net> ---
(In reply to Dave from comment #12)
> RV350 (Shivah) on AGP bus
[...]
> For us, switching the xorg.conf AccelMethod from EXA to glamor caused the
> mess. No problems occur under EXA.

I doubt an RV350 can handle all of glamor's shaders, so you'll have to stick to
EXA for that.

Anyway, not the same problem this bug report is about.

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

--- Comment #14 from Dave <systemdkiosk@yopmail.com> ---
(In reply to Michel Dänzer from comment #13)

Michel you could well be 100% right. I'll simply add,

RV350 failures should emit X log outputs, not X crashes or worse,
hardware/driver/kernel crashes. Code should fail gracefully.

We see screenshots like others here, whatever our issue. People reporting use
glamor. I got here googling for it.

The patch offered struck me as specific to one Radeon GPU. Logic which needs
patching for one GPU may need it for others. If not then such specificity needs
more code comments, perhaps. I'm unaquainted with the code base.

Thanks.

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

--- Comment #15 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Dave from comment #14)
> (In reply to Michel Dänzer from comment #13)
> 
> Michel you could well be 100% right.

While the symptoms may be similar, your issue is completely different, and not
kernel related.  Please open a new bug on https://bugs.freedesktop.org (for the
ddx: product xorg, component Driver/Radeon).

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

Eastern Heart <zxd123314@hotmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |zxd123314@hotmail.com

--- Comment #16 from Eastern Heart <zxd123314@hotmail.com> ---
*** Bug 60741 has been marked as a duplicate of this bug. ***

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--- Comment #17 from Szőgyényi Gábor (szg0000@freemail.hu) ---
Please try to reproduce this bug with latest kernel image.

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[Bug 60674] linux 3.10.x RV740 (Radeon HD 4770) display problem

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https://bugzilla.kernel.org/show_bug.cgi?id=60674

--- Comment #18 from Y. G. (theYinYeti) (bugz@yalis.fr) ---
Sorry, I changed of PC, so the hardware is now completely unrelated, which is
why I let others do tests and all…
On my new hardware, all is fine.

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