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Re: kern/55198: When the video card is Intel Mobile 965GM Express, i915drmkms has error CPU pipe A FIFO underrun, also X freezes/hangs
The following reply was made to PR kern/55198; it has been noted by GNATS.
From: =?Windows-1252?Q?Jo=E3o_Paulo_Vinha_Bittar?= <joaopaulo1511%hotmail.com@localhost>
To: "kern-bug-people%netbsd.org@localhost" <kern-bug-people%netbsd.org@localhost>,
"gnats-admin%netbsd.org@localhost" <gnats-admin%netbsd.org@localhost>, "netbsd-bugs%netbsd.org@localhost"
<netbsd-bugs%netbsd.org@localhost>, "gnats-bugs%netbsd.org@localhost" <gnats-bugs%netbsd.org@localhost>
Cc:
Subject: Re: kern/55198: When the video card is Intel Mobile 965GM Express,
i915drmkms has error CPU pipe A FIFO underrun, also X freezes/hangs
Date: Sat, 25 Apr 2020 20:43:17 +0000
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Content-Type: text/plain; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable
Hi Izumi Tsutsui,
I forgot to mention, but I did run X -configure, edited the xorg.conf.new t=
o have "AccelMethod" "uxa", moved it to /etc/X11/xorg.conf, but it didn't w=
ork on NetBSD 9.0.
I also tried with "Accel" "false", but X still hanged.
I tried the oldest NetBSD version still available at ftp.NetBSD.org, which =
is 7.1.2 (this time on amd64), and X did work out of the box. It also didn=
't have any =93dmesg | grep intel=94 errors.
When I upgraded to NetBSD 7.2 (also amd64), X didn't work out of the box, n=
either worked after modifying xorg.conf. It also didn't have any errors sh=
ow when running =93dmesg | grep intel=94.
So I think something happened between 7.1.2 and 7.2.
________________________________
From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
Sent: Thursday, April 23, 2020 4:00:03 PM
To: kern-bug-people%netbsd.org@localhost <kern-bug-people%netbsd.org@localhost>; gnats-admin@ne=
tbsd.org <gnats-admin%netbsd.org@localhost>; netbsd-bugs%netbsd.org@localhost <netbsd-bugs@netb=
sd.org>; joaopaulo1511%hotmail.com@localhost <joaopaulo1511%hotmail.com@localhost>
Subject: Re: kern/55198: When the video card is Intel Mobile 965GM Express,=
i915drmkms has error CPU pipe A FIFO underrun, also X freezes/hangs
The following reply was made to PR kern/55198; it has been noted by GNATS.
From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: kern/55198: When the video card is Intel Mobile 965GM Express,
i915drmkms has error CPU pipe A FIFO underrun, also X freezes/hang=
s
Date: Fri, 24 Apr 2020 04:58:13 +0900
Maybe something similar as PR/54995 on Atom N455?
https://gnats.netbsd.org/54995
How about adding
> option "AccelMethod" "uxa"
in /etc/X11/xorg.conf ?
If SNA accelaration is problematic on old Intel chips,
maybe we should fallback to UXA on such pre-2010 chipset?
---
Izumi Tsutsui
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Content-Type: text/html; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable
<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body>
<div data-ogsc=3D"" style=3D"">
<meta content=3D"text/html; charset=3Diso-8859-1" data-ogsc=3D"" style=3D""=
>
</div>
<div dir=3D"auto" style=3D"direction: ltr; margin: 0px; padding: 0px; font-=
family: sans-serif; font-size: 11pt; color: black;">
Hi Izumi Tsutsui,<br>
<br>
</div>
<div dir=3D"auto" style=3D"direction: ltr; margin: 0px; padding: 0px; font-=
family: sans-serif; font-size: 11pt; color: black;">
I forgot to mention, but I did run X -configure, edited the xorg.conf.new t=
o have "AccelMethod" "uxa", moved it to /etc/X11/xorg.c=
onf, but it didn't work on NetBSD 9.0.<br>
<br>
</div>
<div dir=3D"auto" style=3D"direction: ltr; margin: 0px; padding: 0px; font-=
family: sans-serif; font-size: 11pt; color: black;">
I also tried with "Accel" "false", but X still hanged.<=
br>
</div>
<div dir=3D"auto" style=3D"direction: ltr; margin: 0px; padding: 0px; font-=
family: sans-serif; font-size: 11pt; color: black;">
<br>
</div>
<div dir=3D"auto" style=3D"direction: ltr; margin: 0px; padding: 0px; font-=
family: sans-serif; font-size: 11pt; color: black; text-align: left;">
I tried the oldest NetBSD version still available at ftp.NetBSD.org, which =
is 7.1.2 (this time on amd64), and X did work out of the box. It also=
didn't have any =93dmesg | grep intel=94 errors.</div>
<div dir=3D"auto" style=3D"direction: ltr; margin: 0px; padding: 0px; font-=
family: sans-serif; font-size: 11pt; color: black; text-align: left;">
<br>
</div>
<div dir=3D"auto" style=3D"direction: ltr; margin: 0px; padding: 0px; font-=
family: sans-serif; font-size: 11pt; color: black; text-align: left;">
When I upgraded to NetBSD 7.2 (also amd64), X didn't work out of the box, n=
either worked after modifying xorg.conf. It also didn't have any erro=
rs show when running =93dmesg | grep intel=94.</div>
<div dir=3D"auto" style=3D"direction: ltr; margin: 0px; padding: 0px; font-=
family: sans-serif; font-size: 11pt; color: black; text-align: left;">
<br>
</div>
<div dir=3D"auto" style=3D"direction: ltr; margin: 0px; padding: 0px; font-=
family: sans-serif; font-size: 11pt; color: black; text-align: left;">
So I think something happened between 7.1.2 and 7.2.</div>
<hr tabindex=3D"-1" style=3D"display: inline-block; width: 98%;" data-ogsc=
=3D"">
<div id=3D"divRplyFwdMsg" dir=3D"ltr" data-ogsc=3D"" style=3D""><font face=
=3D"Calibri, sans-serif" color=3D"#000000" style=3D"font-size: 11pt;" data-=
ogsc=3D""><b>From:</b> Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost><br>
<b>Sent:</b> Thursday, April 23, 2020 4:00:03 PM<br>
<b>To:</b> kern-bug-people%netbsd.org@localhost <kern-bug-people%netbsd.org@localhost>; g=
nats-admin%netbsd.org@localhost <gnats-admin%netbsd.org@localhost>; netbsd-bugs%netbsd.or@localhost=
g <netbsd-bugs%netbsd.org@localhost>; joaopaulo1511%hotmail.com@localhost <joaopaulo15=
11%hotmail.com@localhost><br>
<b>Subject:</b> Re: kern/55198: When the video card is Intel Mobile 965GM E=
xpress, i915drmkms has error CPU pipe A FIFO underrun, also X freezes/hangs=
</font>
<div> </div>
</div>
<div class=3D"BodyFragment" data-ogsc=3D"" style=3D""><font size=3D"2"><spa=
n style=3D"font-size:11pt">
<div class=3D"PlainText">The following reply was made to PR kern/55198; it =
has been noted by GNATS.<br>
<br>
From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost><br>
To: gnats-bugs%netbsd.org@localhost<br>
Cc: tsutsui%ceres.dti.ne.jp@localhost<br>
Subject: Re: kern/55198: When the video card is Intel Mobile 965GM Express,=
<br>
i915drmkms has error CPU p=
ipe A FIFO underrun, also X freezes/hangs<br>
Date: Fri, 24 Apr 2020 04:58:13 +0900<br>
<br>
Maybe something similar as PR/54995 on Atom N455?<br>
<a href=3D"https://gnats.netbsd.org/54995"; data-ogsc=3D"" style=3D""=
>https://gnats.netbsd.org/54995</a><br>
<br>
How about adding<br>
> option "AccelMethod" "uxa"<br>
in /etc/X11/xorg.conf ?<br>
<br>
If SNA accelaration is problematic on old Intel chips,<br>
maybe we should fallback to UXA on such pre-2010 chipset?<br>
<br>
---<br>
Izumi Tsutsui<br>
<br>
</div>
</span></font></div>
</body>
</html>
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