Len Brown wrote:
Linux appears to be a special case in this BIOS. ISLI returns 1 for OSI(Linux), which causes GUSB to do nothing. (otherwise GUSB appears to touch SMM). GUSB is called at init time, and also at wakup time.
I will need to read up a little on these terms (ISLI, GUSB, SMM), as I know neither of them so far.
Do you notice any difference in USB operation with acpi_osi=Linux? How about after resume from suspend?
I assume you are referring to suspend to disk? I don't use this on this system.
I don't know whether it is related, but on this kernel (recent Debian testing backport to stable)...
Linux version 2.6.22-3-amd64 (Debian 2.6.22-6~bpo40+1) (nobse@xxxxxxxxxxxxx) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP Mon Nov 12 17:53:18 UTC 2007
...this got written to syslog when I switched on my monitor, a DELL 2007WFPb, which contains a USB hub (yes this is silly) which is connected to a rear USB connector of the PC:
Feb 14 09:42:54 pcnau kernel: usb 7-5: new high speed USB device using ehci_hcd and address 5
Feb 14 09:42:54 pcnau kernel: usb 7-5: configuration #1 chosen from 1 choice Feb 14 09:42:54 pcnau kernel: hub 7-5:1.0: USB hub found Feb 14 09:42:54 pcnau kernel: hub 7-5:1.0: 4 ports detected Feb 14 09:46:14 pcnau kernel: rtc: lost some interrupts at 2048Hz. Feb 14 09:46:28 pcnau last message repeated 11 times Feb 14 09:46:31 pcnau kernel: printk: 8 messages suppressed. Feb 14 09:46:31 pcnau kernel: rtc: lost some interrupts at 2048Hz. Feb 14 09:46:40 pcnau kernel: printk: 20 messages suppressed. Feb 14 09:46:40 pcnau kernel: rtc: lost some interrupts at 2048Hz. Feb 14 09:47:03 pcnau kernel: printk: 1 messages suppressed. Feb 14 09:47:03 pcnau kernel: rtc: lost some interrupts at 2048Hz. Feb 14 09:47:04 pcnau last message repeated 4 times Feb 14 09:47:11 pcnau kernel: printk: 13 messages suppressed. Feb 14 09:47:11 pcnau kernel: rtc: lost some interrupts at 2048Hz. Feb 14 09:47:11 pcnau kernel: printk: 6 messages suppressed. Feb 14 09:47:11 pcnau kernel: rtc: lost some interrupts at 2048Hz. Feb 14 09:47:30 pcnau kernel: printk: 13 messages suppressed. Feb 14 09:47:30 pcnau kernel: rtc: lost some interrupts at 2048Hz. Feb 14 09:47:32 pcnau last message repeated 3 times Feb 14 09:47:43 pcnau kernel: printk: 18 messages suppressed. Feb 14 09:47:43 pcnau kernel: rtc: lost some interrupts at 2048Hz. Feb 14 09:49:16 pcnau kernel: rtc: lost some interrupts at 2048Hz. Feb 14 09:49:16 pcnau kernel: rtc: lost some interrupts at 2048Hz.I can try the same thing with acpi_osi=Linux if it would help. I could also run a speed test for writing to USB flash disks with and without acpi_osi=Linux if this would be of help. Other than that, I don't know what exactly to look for (and I have not run in acpi_osi=Linux mode, yet). Can you recommend a specific test to run?
Moritz
Attachment:
smime.p7s
Description: S/MIME cryptographic signature
