Segmentation fault in X after last upgrade

[Magnus Therning]

I just upgraded this morning and after a reboot X refuses to start.
My /var/log/Xorg.0.log contains a message about a segmentation fault
and a short backtrace.

I'm on AMD64, with an nVidia card (I'm using the Xorg driver, nv).

Anyone else seeing something the same behaviour?
Any suggestions on how I can get my system back to normal again?

/M

--
Magnus Therning                        (OpenPGP: 0xAB4DFBA4)
[e-mail]          Jabber: [e-mail]
http://therning.org/magnus         identi.ca|twitter: magthe

[Tobias Powalowski]

Am Montag 02 November 2009 schrieb Magnus Therning:

> I just upgraded this morning and after a reboot X refuses to start.
> My /var/log/Xorg.0.log contains a message about a segmentation fault
> and a short backtrace.
>
> I'm on AMD64, with an nVidia card (I'm using the Xorg driver, nv).
>
> Anyone else seeing something the same behaviour?
> Any suggestions on how I can get my system back to normal again?
>
> /M
>

You could try nouveau driver instead.

--
Tobias Powalowski
Archlinux Developer & Package Maintainer (tpowa)
http://www.archlinux.org
tpowa@...

[Magnus Therning]

On Mon, Nov 2, 2009 at 11:57 AM, Tobias Powalowski <t.powa@...> wrote:

> Am Montag 02 November 2009 schrieb Magnus Therning:
>> I just upgraded this morning and after a reboot X refuses to start.
>> My /var/log/Xorg.0.log contains a message about a segmentation fault
>> and a short backtrace.
>>
>> I'm on AMD64, with an nVidia card (I'm using the Xorg driver, nv).
>>
>> Anyone else seeing something the same behaviour?
>> Any suggestions on how I can get my system back to normal again?
>>
>> /M
>>
> You could try nouveau driver instead.

Is that driver as mature as the Xorg nv driver?  (I don't really care
about 3d stuff, so the Xorg driver is feature full enoug.)

In the meantime I've downgraded to xorg-server from 4 Sep (and device
packages from even earlier).

Had I thought about it I would have tried removing the nv package and
let X run with vesa instead.  I'll have to get some work done first
thought, maybe I have time to try it later today or tomorrow.

/M

--
Magnus Therning                        (OpenPGP: 0xAB4DFBA4)
[e-mail]          Jabber: [e-mail]
http://therning.org/magnus         identi.ca|twitter: magthe

[Tobias Powalowski]

Am Montag 02 November 2009 schrieb Magnus Therning:

> On Mon, Nov 2, 2009 at 11:57 AM, Tobias Powalowski <t.powa@...> wrote:
> > Am Montag 02 November 2009 schrieb Magnus Therning:
> >> I just upgraded this morning and after a reboot X refuses to start.
> >> My /var/log/Xorg.0.log contains a message about a segmentation fault
> >> and a short backtrace.
> >>
> >> I'm on AMD64, with an nVidia card (I'm using the Xorg driver, nv).
> >>
> >> Anyone else seeing something the same behaviour?
> >> Any suggestions on how I can get my system back to normal again?
> >>
> >> /M
> >
> > You could try nouveau driver instead.
>
> Is that driver as mature as the Xorg nv driver?  (I don't really care
> about 3d stuff, so the Xorg driver is feature full enoug.)
>
> In the meantime I've downgraded to xorg-server from 4 Sep (and device
> packages from even earlier).
>
> Had I thought about it I would have tried removing the nv package and
> let X run with vesa instead.  I'll have to get some work done first
> thought, maybe I have time to try it later today or tomorrow.
>
> /M
>

Before using vesa driver you should at least give nouveau and nv driver a

shot.
Both lack on 3D support but for 2D operations they should work fine.
Nouveau has nice kms support, which is nice if it works on your card.
http://wiki.archlinux.org/index.php/Nouveau

greetings
tpowa
--
Tobias Powalowski
Archlinux Developer & Package Maintainer (tpowa)
http://www.archlinux.org
tpowa@...

[Xavier Chantry-2]

On Mon, Nov 2, 2009 at 1:54 PM, Tobias Powalowski <t.powa@...> wrote:
> Before using vesa driver you should at least give nouveau and nv driver a
> shot.
> Both lack on 3D support but for 2D operations they should work fine.
> Nouveau has nice kms support, which is nice if it works on your card.
> http://wiki.archlinux.org/index.php/Nouveau
>

kms is nice indeed, but I am pretty sure there are many other
advantages of nouveau over nv
http://nouveau.freedesktop.org/wiki/
"2-D support is in fairly good shape with EXA acceleration, Xv and
Randr12 (dual-head, rotations, etc.). "

For instance nv does not have xv, which is a must have for video playback.
And I don't know if nv supports exa and randr12.

And nouveau kms also supports "suspend & resume".

[Magnus Therning]

On Mon, Nov 2, 2009 at 12:54 PM, Tobias Powalowski <t.powa@...> wrote:

> Am Montag 02 November 2009 schrieb Magnus Therning:
>> On Mon, Nov 2, 2009 at 11:57 AM, Tobias Powalowski <t.powa@...> wrote:
>> > Am Montag 02 November 2009 schrieb Magnus Therning:
>> >> I just upgraded this morning and after a reboot X refuses to start.
>> >> My /var/log/Xorg.0.log contains a message about a segmentation fault
>> >> and a short backtrace.
>> >>
>> >> I'm on AMD64, with an nVidia card (I'm using the Xorg driver, nv).
>> >>
>> >> Anyone else seeing something the same behaviour?
>> >> Any suggestions on how I can get my system back to normal again?
>> >>
>> >> /M
>> >
>> > You could try nouveau driver instead.
>>
>> Is that driver as mature as the Xorg nv driver?  (I don't really care
>> about 3d stuff, so the Xorg driver is feature full enoug.)
>>
>> In the meantime I've downgraded to xorg-server from 4 Sep (and device
>> packages from even earlier).
>>
>> Had I thought about it I would have tried removing the nv package and
>> let X run with vesa instead.  I'll have to get some work done first
>> thought, maybe I have time to try it later today or tomorrow.
>>
>> /M
>>
> Before using vesa driver you should at least give nouveau and nv driver a
> shot.
> Both lack on 3D support but for 2D operations they should work fine.
> Nouveau has nice kms support, which is nice if it works on your card.
> http://wiki.archlinux.org/index.php/Nouveau

Well, all I'm really interested in is finding out whether it's
xorg-server or xf86-video-nv which is broken.  Then raise a bug, and
get it fixed :-)

/M

--
Magnus Therning                        (OpenPGP: 0xAB4DFBA4)
[e-mail]          Jabber: [e-mail]
http://therning.org/magnus         identi.ca|twitter: magthe

[Xavier Chantry-2]

On Mon, Nov 2, 2009 at 3:07 PM, Magnus Therning <magnus@...> wrote:
>
> Well, all I'm really interested in is finding out whether it's
> xorg-server or xf86-video-nv which is broken.  Then raise a bug, and
> get it fixed :-)
>

Another big difference between nv and nouveau is that nouveau is
actively developed.
http://cgit.freedesktop.org/xorg/driver/xf86-video-nv/log/
http://cgit.freedesktop.org/nouveau/xf86-video-nouveau/log/

nv still seems to be maintained, but you will be probably more lucky
by reporting problems to nouveau.

And to quote someone who knows better than me on irc : "Nouveau beats
nv on every single metric you can come up with" :)

[Dieter Plaetinck]

On Mon, 2 Nov 2009 14:18:53 +0100
Xavier <shiningxc@...> wrote:

> On Mon, Nov 2, 2009 at 1:54 PM, Tobias Powalowski <t.powa@...>
> wrote:
> > Before using vesa driver you should at least give nouveau and nv
> > driver a shot.
> > Both lack on 3D support but for 2D operations they should work fine.
> > Nouveau has nice kms support, which is nice if it works on your
> > card. http://wiki.archlinux.org/index.php/Nouveau
> >
>
> kms is nice indeed, but I am pretty sure there are many other
> advantages of nouveau over nv
> http://nouveau.freedesktop.org/wiki/
> "2-D support is in fairly good shape with EXA acceleration, Xv and
> Randr12 (dual-head, rotations, etc.). "
>
> For instance nv does not have xv, which is a must have for video
> playback. And I don't know if nv supports exa and randr12.
>
> And nouveau kms also supports "suspend & resume".

i installed xf86-video-nouveau on my box at home.
for simple things it works fine.
but for intensive applications (that do a lot of redrawing, i guess)
such as rosegarden, it makes my PC really slow.
also 2D games such as world of goo are unbearingly slow.
and i won't start about 3D ;)


this really sucks.  i have a perfectly fine fx5800 card. it performs
(performed) very well, sucks to have it labeled as "deprecated" and not
being able to actually use it decently on a modern system.

Dieter

[Xavier Chantry-2]

On Mon, Nov 2, 2009 at 3:46 PM, Dieter Plaetinck <dieter@...> wrote:
>
> i installed xf86-video-nouveau on my box at home.
> for simple things it works fine.
> but for intensive applications (that do a lot of redrawing, i guess)
> such as rosegarden, it makes my PC really slow.
> also 2D games such as world of goo are unbearingly slow.
> and i won't start about 3D ;)
>

I don't know about rosegarden, but worldofgoo uses opengl, so this
requires the whole 3d stack to be accelerated.
Otherwise you are just using software rendering which is indeed very slow.
That means you need nouveau-dri, but I don't know how well it works
for your chipset.

http://nouveau.freedesktop.org/wiki/FeatureMatrix
http://nouveau.freedesktop.org/wiki/CodeNames

According to this, 3d works better on Geforce 6 and newer.
Not sure about Geforce 5.

>
> this really sucks.  i have a perfectly fine fx5800 card. it performs
> (performed) very well, sucks to have it labeled as "deprecated" and not
> being able to actually use it decently on a modern system.
>

Actually it is not clear to me that it is labeled as such.
See the link that tpowa gave :
http://www.nvnews.net/vbulletin/showthread.php?t=139388&highlight=x.org

It seems there are plans to support 96xx (and so likely 173xx). Just
that it has not been done yet.

[Edgar Kalkowski]

Magnus Therning schrob:
> Anyone else seeing something the same behaviour?

Not the exact same thing here but since the latest upgrade to X.org 1.7.1 and Nvidia 190.42 two days ago my X already crashed twice with no errors in /var/log/Xorg.0.log except the following backtrace (with segfault):

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x28) [0x45cf48]
1: /usr/bin/X (0x400000+0x59ea9) [0x459ea9]
2: /lib/libpthread.so.0 (0x7f2572faa000+0xe7e0) [0x7f2572fb87e0]
3: /usr/lib/xorg/modules/drivers/nvidia_drv.so (0x7f256eb4b000+0xa4aa2) [0x7f256ebefaa2]
4: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0xa6d2) [0x7f257361e6d2]
5: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0x352a9) [0x7f25736492a9]
6: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0x2f9ab) [0x7f25736439ab]
7: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0x37722) [0x7f257364b722]
8: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0x38a90) [0x7f257364ca90]
9: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0x2f6ba) [0x7f25736436ba]
10: /usr/lib/libpixman-1.so.0 (pixman_image_composite+0x17c) [0x7f25736444ec]
11: /usr/lib/xorg/modules/libwfb.so (wfbComposite+0x163) [0x7f256e71fc43]
12: /usr/lib/xorg/modules/drivers/nvidia_drv.so (0x7f256eb4b000+0x33e817) [0x7f256ee89817]
13: /usr/bin/X (0x400000+0xc2780) [0x4c2780]
14: /usr/bin/X (0x400000+0x9baf9) [0x49baf9]
15: /usr/bin/X (0x400000+0x9bdc5) [0x49bdc5]
16: /usr/bin/X (0x400000+0x110d86) [0x510d86]
17: /usr/bin/X (0x400000+0x22726) [0x422726]
18: /usr/bin/X (MapWindow+0x153) [0x424893]
19: /usr/bin/X (0x400000+0x45976) [0x445976]
20: /usr/bin/X (0x400000+0x466a4) [0x4466a4]
21: /usr/bin/X (0x400000+0x2202c) [0x42202c]
22: /lib/libc.so.6 (__libc_start_main+0xfd) [0x7f25720549ed]
23: /usr/bin/X (0x400000+0x21bd9) [0x421bd9]
Segmentation fault at address 0x7f258d399000

Fatal server error:
Caught signal 11 (Segmentation fault). Server aborting


I don’t think that this really helps but at least you know that you are not alone. ;)

Ed

Hi,

Xorg with nvidia-96xx for a GeForce 3 Ti 200 does not start anymore on
my Arch Linux installation (i686). First I thought that it was a failure
caused by SLiM because the error output on screen was "respawning too
fast" and I switched from respawn to once but that did not help. Even
standalone X does not start. I looked into the log file and there were
messages about that freetype and kbd cannot be found. But both are
installed. Are these problems connected to each other?

Bye
Lars

Edgar Kalkowski wrote:

> Magnus Therning schrob:
>> Anyone else seeing something the same behaviour?
>
> Not the exact same thing here but since the latest upgrade to X.org 1.7.1 and Nvidia 190.42 two days ago my X already crashed twice with no errors in /var/log/Xorg.0.log except the following backtrace (with segfault):
>
> Backtrace:
> 0: /usr/bin/X (xorg_backtrace+0x28) [0x45cf48]
> 1: /usr/bin/X (0x400000+0x59ea9) [0x459ea9]
> 2: /lib/libpthread.so.0 (0x7f2572faa000+0xe7e0) [0x7f2572fb87e0]
> 3: /usr/lib/xorg/modules/drivers/nvidia_drv.so (0x7f256eb4b000+0xa4aa2) [0x7f256ebefaa2]
> 4: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0xa6d2) [0x7f257361e6d2]
> 5: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0x352a9) [0x7f25736492a9]
> 6: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0x2f9ab) [0x7f25736439ab]
> 7: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0x37722) [0x7f257364b722]
> 8: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0x38a90) [0x7f257364ca90]
> 9: /usr/lib/libpixman-1.so.0 (0x7f2573614000+0x2f6ba) [0x7f25736436ba]
> 10: /usr/lib/libpixman-1.so.0 (pixman_image_composite+0x17c) [0x7f25736444ec]
> 11: /usr/lib/xorg/modules/libwfb.so (wfbComposite+0x163) [0x7f256e71fc43]
> 12: /usr/lib/xorg/modules/drivers/nvidia_drv.so (0x7f256eb4b000+0x33e817) [0x7f256ee89817]
> 13: /usr/bin/X (0x400000+0xc2780) [0x4c2780]
> 14: /usr/bin/X (0x400000+0x9baf9) [0x49baf9]
> 15: /usr/bin/X (0x400000+0x9bdc5) [0x49bdc5]
> 16: /usr/bin/X (0x400000+0x110d86) [0x510d86]
> 17: /usr/bin/X (0x400000+0x22726) [0x422726]
> 18: /usr/bin/X (MapWindow+0x153) [0x424893]
> 19: /usr/bin/X (0x400000+0x45976) [0x445976]
> 20: /usr/bin/X (0x400000+0x466a4) [0x4466a4]
> 21: /usr/bin/X (0x400000+0x2202c) [0x42202c]
> 22: /lib/libc.so.6 (__libc_start_main+0xfd) [0x7f25720549ed]
> 23: /usr/bin/X (0x400000+0x21bd9) [0x421bd9]
> Segmentation fault at address 0x7f258d399000
>
> Fatal server error:
> Caught signal 11 (Segmentation fault). Server aborting
>
>
> I don’t think that this really helps but at least you know that you are not alone. ;)
>
> Ed

[Thomas Bächler-2]

Lars Tennstedt schrieb:
> Hi,
>
> Xorg with nvidia-96xx for a GeForce 3 Ti 200 does not start anymore on
> my Arch Linux installation (i686). First I thought that it was a failure
> caused by SLiM because the error output on screen was "respawning too
> fast" and I switched from respawn to once but that did not help. Even
> standalone X does not start. I looked into the log file and there were
> messages about that freetype and kbd cannot be found. But both are
> installed. Are these problems connected to each other?

http://mailman.archlinux.org/pipermail/arch-dev-public/2009-October/014167.html

Or better:
http://www.nvnews.net/vbulletin/showthread.php?t=139388

I don't know what you think, but I don't get the part where the nvidia
dev says they plan to fix it, but he can't promise if and when. So they
plan to fix it, but don't really know if they plan to fix it.

So basically, you're screwed unless you plan on buying a GeForce 6 or newer.

[Guus Snijders]

Thomas Bächler schreef:

[ Xorg segfaults with Nvidia driver ]

> I don't know what you think, but I don't get the part where the nvidia
> dev says they plan to fix it, but he can't promise if and when. So
> they plan to fix it, but don't really know if they plan to fix it.
>
> So basically, you're screwed unless you plan on buying a GeForce 6 or
> newer.
Maybe a good time to try the nouveau driver?

I don't have a system with an Nvidia vga currently, but from waht i hear
it's getting quite good.


mvg,
     Guus

Hello,

it seems that the NVIDIA developers will only fix it if they have time
to do it. I guess that the legacy driver does not have a high priority.

I tried the nouveau driver and it works on my old GeForce 3 even with
compositing. It is a little bit slow but it does the job. Thanks for the
hint.
But on my other computer the nouveau driver does not work with a GeForce
7. It is weird. Two NVIDIA graphic cards and one needs the closed source
driver and the another one the open source one.


Bye
Lars


Guus Snijders wrote:

> Thomas Bächler schreef:
>
> [ Xorg segfaults with Nvidia driver ]
>
>> I don't know what you think, but I don't get the part where the nvidia
>> dev says they plan to fix it, but he can't promise if and when. So
>> they plan to fix it, but don't really know if they plan to fix it.
>>
>> So basically, you're screwed unless you plan on buying a GeForce 6 or
>> newer.
> Maybe a good time to try the nouveau driver?
>
> I don't have a system with an Nvidia vga currently, but from waht i hear
> it's getting quite good.
>
>
> mvg,
>     Guus
>

[Xavier Chantry-2]

On Wed, Nov 4, 2009 at 7:48 PM, Lars Tennstedt <oss@...> wrote:

> Hello,
>
> it seems that the NVIDIA developers will only fix it if they have time to do
> it. I guess that the legacy driver does not have a high priority.
>
> I tried the nouveau driver and it works on my old GeForce 3 even with
> compositing. It is a little bit slow but it does the job. Thanks for the
> hint.
> But on my other computer the nouveau driver does not work with a GeForce 7.
> It is weird. Two NVIDIA graphic cards and one needs the closed source driver
> and the another one the open source one.
>
>

Geforce 7 should work, see the links in
http://wiki.archlinux.org/index.php/Nouveau#Installation

If it does not work at all, you should report that to upstream developers.
Maybe try first the latest packages which have just been moved to extra today.

Xavier wrote:

> On Wed, Nov 4, 2009 at 7:48 PM, Lars Tennstedt <oss@...> wrote:
>> Hello,
>>
>> it seems that the NVIDIA developers will only fix it if they have time to do
>> it. I guess that the legacy driver does not have a high priority.
>>
>> I tried the nouveau driver and it works on my old GeForce 3 even with
>> compositing. It is a little bit slow but it does the job. Thanks for the
>> hint.
>> But on my other computer the nouveau driver does not work with a GeForce 7.
>> It is weird. Two NVIDIA graphic cards and one needs the closed source driver
>> and the another one the open source one.
>>
>>
>
> Geforce 7 should work, see the links in
> http://wiki.archlinux.org/index.php/Nouveau#Installation
>
> If it does not work at all, you should report that to upstream developers.
> Maybe try first the latest packages which have just been moved to extra today.

I use a mirror that contains the version git20091013. It is behind the
original Arch Linux mirror. It syncs daily so I guess that I will get
the new version tomorrow. Then I will try again.


By
Lars

Lars Tennstedt wrote:

>
>
> Xavier wrote:
>> On Wed, Nov 4, 2009 at 7:48 PM, Lars Tennstedt <oss@...>
>> wrote:
>>> Hello,
>>>
>>> it seems that the NVIDIA developers will only fix it if they have
>>> time to do
>>> it. I guess that the legacy driver does not have a high priority.
>>>
>>> I tried the nouveau driver and it works on my old GeForce 3 even with
>>> compositing. It is a little bit slow but it does the job. Thanks for the
>>> hint.
>>> But on my other computer the nouveau driver does not work with a
>>> GeForce 7.
>>> It is weird. Two NVIDIA graphic cards and one needs the closed source
>>> driver
>>> and the another one the open source one.
>>>
>>>
>>
>> Geforce 7 should work, see the links in
>> http://wiki.archlinux.org/index.php/Nouveau#Installation
>>
>> If it does not work at all, you should report that to upstream
>> developers.
>> Maybe try first the latest packages which have just been moved to
>> extra today.
>
>
>
> I use a mirror that contains the version git20091013. It is behind the
> original Arch Linux mirror. It syncs daily so I guess that I will get
> the new version tomorrow. Then I will try again.
>
>
> By
> Lars

Hello again,

with the new version of nouveau Xorg works well with my GeForce 7 card.
Compositing is still very buggy under KDE 4.3.3 in this case. There are
no problems with compositing using Xfwm 4 or Xfce 4.6.1 on my other
computer with a GeForce 3. I decide to use nouveau without compositing
on my newer computer and will try desktop effects again if a new version
of nouveau is released to give feedback to the developers.

Have a nice day.

Bye
Lars

[David C. Rankin]

>
>
> this really sucks.  i have a perfectly fine fx5800 card. it performs
> (performed) very well, sucks to have it labeled as "deprecated" and not
> being able to actually use it decently on a modern system.
>
> Dieter
>

Just be thankful you are not using ATI hardware where everything prior to the
2400 Series cards were deprecated to "Legacy" cards and all Linux support
dropped in March ;-)

(performance difference between fglrx and ati 1066 FPS version 160 FPS, and
the downclocking isn't present in the opensource driver (not the gpu
powerdown) and temps are up 25 degrees (you feel it in the laptop palm rest).

--
David C. Rankin, J.D.,P.E.
Rankin Law Firm, PLLC
510 Ochiltree Street
Nacogdoches, Texas 75961
Telephone: [phone]
Facsimile: [phone]
www.rankinlawfirm.com

[Xavier Chantry-2]

On Wed, Nov 11, 2009 at 3:01 PM, David C. Rankin
<drankinatty@...> wrote:
>
> Just be thankful you are not using ATI hardware where everything prior to the
> 2400 Series cards were deprecated to "Legacy" cards and all Linux support
> dropped in March ;-)
>
> (performance difference between fglrx and ati 1066 FPS version 160 FPS, and
> the downclocking isn't present in the opensource driver (not the gpu
> powerdown) and temps are up 25 degrees (you feel it in the laptop palm rest).
>

Heh.

ati 3d support is much more advanced and mature than nouveau one.

And I thought ati had some sort of downclocking support. But I am not
100% sure. From your comment, maybe it can just downclock the mem
speed and not the gpu speed ?
In any cases, for nouveau it is inexistent.

[Nezmer-2]

On Wed, Nov 11, 2009 at 03:45:13PM +0100, Xavier wrote:

> On Wed, Nov 11, 2009 at 3:01 PM, David C. Rankin
> <drankinatty@...> wrote:
> >
> > Just be thankful you are not using ATI hardware where everything prior to the
> > 2400 Series cards were deprecated to "Legacy" cards and all Linux support
> > dropped in March ;-)
> >
> > (performance difference between fglrx and ati 1066 FPS version 160 FPS, and
> > the downclocking isn't present in the opensource driver (not the gpu
> > powerdown) and temps are up 25 degrees (you feel it in the laptop palm rest).
> >
>
> Heh.
>
> ati 3d support is much more advanced and mature than nouveau one.
>
> And I thought ati had some sort of downclocking support. But I am not
> 100% sure. From your comment, maybe it can just downclock the mem
> speed and not the gpu speed ?
> In any cases, for nouveau it is inexistent.

The opensource ATI drivers are definitely in a very good shape
especially at this stage of development.

I decided to ditch catalyst* completely the other day until I had
to get out and actually use the battery. The battery life dropped
40-50%. I wasn't even aware GPU consumes that much power .

So, yes the opensource ATI drivers are great but not for laptop usage.


*my card (Mobility Radeon HD 4570 is M92 based which is still supported).