linux-kernel - Re: KMS regression (Re: Linux 2.6.32.2)

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Message-ID: <a728f9f90912230048p112235fag9a353ec926ce2cc6@mail.gmail.com>
Date:	Wed, 23 Dec 2009 03:48:04 -0500
From:	Alex Deucher <alexdeucher@...il.com>
To:	Timo Jantunen <jeti@...ho.com>
Cc:	Greg KH <gregkh@...e.de>, LKML <linux-kernel@...r.kernel.org>,
	torvalds@...ux-foundation.org, stable@...nel.org
Subject: Re: KMS regression (Re: Linux 2.6.32.2)

On Wed, Dec 23, 2009 at 3:43 AM, Timo Jantunen <jeti@...ho.com> wrote:
> On Fri, 18 Dec 2009, Greg KH wrote:
>
>> I'm announcing the release of the 2.6.32.2 kernel.  All users of the
>> 2.6.32 kernel series are very strongly encouraged to upgrade.
>
>
>> Alex Deucher (5):
>>     drm/radeon/kms: handle vblanks properly with dpms on
>
> This patch breaks KMS on my machine. If it is in, the screen goes blank, and
> as far as I can tell the machine hangs (no disk activity, SysRq keys don't
> work, nothing on the netconsole.) The machine boots (and works) normally if
> KMS is disabled.
>

Already fixed with this patch:
http://marc.info/?l=dri-devel&m=126137027403059&w=2

Alex

> I'm using the DVI connector.
>
> lspci
> ===cut
> 01:00.0 VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD
> 4850] (prog-if 00 [VGA controller])
>        Subsystem: Giga-byte Technology Device 21c7
>        Flags: bus master, fast devsel, latency 0, IRQ 16
>        Memory at e0000000 (64-bit, prefetchable) [size=256M]
>        Memory at fbde0000 (64-bit, non-prefetchable) [size=64K]
>        I/O ports at ce00 [size=256]
>        [virtual] Expansion ROM at fbd00000 [disabled] [size=128K]
>        Capabilities: [50] Power Management version 3
>        Capabilities: [58] Express Legacy Endpoint, MSI 00
>        Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
>        Capabilities: [100] Vendor Specific Information <?>
> ===cut
>
> And partial dmesg from 2.6.32.2 with that one patch reverted:
> dmesg | egrep 'drm|radeon'
> ===cut
> Kernel command line: ro root=/dev/sda2
> netconsole=2001@...0.0.1/eth0,2001@...0.0.254/ vga=6 radeon.modeset=1
> [drm] Initialized drm 1.1.0 20060810
> [drm] radeon kernel modesetting enabled.
> radeon 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
> radeon 0000:01:00.0: setting latency timer to 64
> [drm] radeon: Initializing kernel modesetting.
> [drm] register mmio base: 0xFBDE0000
> [drm] register mmio size: 65536
> [drm] Clocks initialized !
> [drm] Detected VRAM RAM=256M, BAR=256M
> [drm] RAM width 256bits DDR
> [drm] radeon: 256M of VRAM memory ready
> [drm] radeon: 512M of GTT memory ready.
> [drm] Loading RV770 CP Microcode
> platform radeon_cp.0: firmware: using built-in firmware radeon/RV770_pfp.bin
> platform radeon_cp.0: firmware: using built-in firmware radeon/RV770_me.bin
> [drm] GART: num cpu pages 131072, num gpu pages 131072
> [drm] ring test succeeded in 1 usecs
> [drm] radeon: ib pool ready.
> [drm] ib test succeeded in 0 usecs
> [drm] Radeon Display Connectors
> [drm] Connector 0:
> [drm]   HDMI-A
> [drm]   DDC: 0x7e60 0x7e60 0x7e64 0x7e64 0x7e68 0x7e68 0x7e6c 0x7e6c
> [drm]   Encoders:
> [drm]     DFP1: INTERNAL_UNIPHY
> [drm] Connector 1:
> [drm]   VGA
> [drm]   DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c
> [drm]   Encoders:
> [drm]     CRT2: INTERNAL_KLDSCP_DAC2
> [drm] Connector 2:
> [drm]   DVI-I
> [drm]   DDC: 0x7e20 0x7e20 0x7e24 0x7e24 0x7e28 0x7e28 0x7e2c 0x7e2c
> [drm]   Encoders:
> [drm]     CRT1: INTERNAL_KLDSCP_DAC1
> [drm]     DFP2: INTERNAL_KLDSCP_LVTMA
> [drm] fb mappable at 0xE0141000
> [drm] vram apper at 0xE0000000
> [drm] size 7680000
> [drm] fb depth is 24
> [drm]    pitch is 6400
> [drm] TMDS-15: set mode 1600x1200 21
> fb0: radeondrmfb frame buffer device
> [drm] Initialized radeon 2.0.0 20080528 for 0000:01:00.0 on minor 0
> ===cut
>
>
> //T
>
>
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