Gentoo Websites Logo
Go to: Gentoo Home Documentation Forums Lists Bugs Planet Store Wiki Get Gentoo!
Bug 168447 - synaptics touchpad not detected on HP-500 (drivers/input/serio/i8042.c bug)
Summary: synaptics touchpad not detected on HP-500 (drivers/input/serio/i8042.c bug)
Status: RESOLVED FIXED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: All Linux
: High normal
Assignee: Daniel Drake (RETIRED)
URL: http://forums.gentoo.org/viewtopic-t-...
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2007-02-26 12:36 UTC by Jakub Moc (RETIRED)
Modified: 2007-05-19 05:31 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---

Attachments
dmesg (dmesg,16.15 KB, text/plain)
2007-05-11 19:28 UTC, Jakub Moc (RETIRED) 		Details
dmesg.noaux (dmesg.noaux,16.04 KB, text/plain)
2007-05-11 19:28 UTC, Jakub Moc (RETIRED) 		Details
dmesg.patched (dmesg.patched,16.21 KB, text/plain)
2007-05-11 19:50 UTC, Jakub Moc (RETIRED) 		Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Jakub Moc (RETIRED) gentoo-dev 2007-02-26 12:36:12 UTC 
Before I completely forget about this... The checks in drivers/input/serio/i8042.c are broken with this particular piece of HW (see also the URL, exact same problem), on every kernel I tried, up to 2.6.20.1

<dmesg snip>
Failed to disable AUX port, but continuing anyway... Is this a SiS?
If AUX port is really absent please use the 'i8042.noaux' option.
serio: i8042 KBD port at 0x60,0x64 irq 1
mice: PS/2 mouse device common for all mice
</dmesg snip>

This "patch" works around the issue but of course cannot be submitted upstream like this :P

http://dev.gentoo.org/~masterdriverz/i8042.patch
Comment 1 Daniel Drake (RETIRED) gentoo-dev 2007-02-26 17:48:45 UTC 
Is it a SiS?

The code flow suggests that the noaux parameter should have the same effect. Does that approach work as well?
Comment 2 Jakub Moc (RETIRED) gentoo-dev 2007-02-26 17:51:41 UTC 
(In reply to comment #1)
> Is it a SiS?

No, it's not. Intel 915GM/L.
 
> The code flow suggests that the noaux parameter should have the same effect.
> Does that approach work as well?

Doesn't work at all.
Comment 3 Daniel Drake (RETIRED) gentoo-dev 2007-02-26 18:10:07 UTC 
Please attach full dmesg 3 times:
1. normal boot, no patch, no param
2. no patch, with noaux param
3. fix applied, no param
Comment 4 Daniel Drake (RETIRED) gentoo-dev 2007-03-24 17:31:38 UTC 
see comment #3
Comment 5 Jakub Moc (RETIRED) gentoo-dev 2007-05-11 19:28:35 UTC 
Created attachment 118897 [details]
dmesg
Comment 6 Jakub Moc (RETIRED) gentoo-dev 2007-05-11 19:28:56 UTC 
Created attachment 118898 [details]
dmesg.noaux
Comment 7 Jakub Moc (RETIRED) gentoo-dev 2007-05-11 19:50:07 UTC 
Created attachment 118899 [details]
dmesg.patched
Comment 8 Jakub Moc (RETIRED) gentoo-dev 2007-05-11 19:50:36 UTC 
Sorry, forgot about this bug. Reopen w/ requested info.
Comment 9 Daniel Drake (RETIRED) gentoo-dev 2007-05-17 01:41:02 UTC 
Thanks for the logs. You do have an AUX port (so noaux won't help!), but for some reason during checking it fails, probably when checking the I8042_CTR_AUXDIS bit.

2.6.22-rc1 includes a fix here, which I'm reasonably confident will solve the problem. Can you test it?

Direct link to the patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff_plain;h=d2ada5597d33a9108acb2caf912f85cbc9caab1e

I checked that it applies cleanly to 2.6.21.
Comment 10 Jakub Moc (RETIRED) gentoo-dev 2007-05-17 05:17:21 UTC 
(In reply to comment #9)
> 2.6.22-rc1 includes a fix here, which I'm reasonably confident will solve the
> problem. Can you test it?

Yup; much cleaner than the 't3h noes' one. *g*  Would appreciate if you could include it in next gentoo-sources-2.6.21 patchset.

FIXED for me.
Comment 11 Daniel Drake (RETIRED) gentoo-dev 2007-05-19 05:31:53 UTC 
Fixed in gentoo-sources-2.6.21-r1 (genpatches-2.6.21-2)