On Sun, 17 Mar 2013, Stef wrote: > On 16/03/2013 13:38, Nico Hoffmann wrote: >> >> Hi, >> >> i've have maybe a rather stupid question, but here we go: >> >> I own an older scanner plustek optic slim 1200, which uses the gt68xx >> backend. For years, it worked fine with sane. Since several month (at >> least with sane-backends 1.0.23), I can not use this scanner anymore, >> because it fails with following message: >> >> | # ./scanimage -x 10cm -y 10 cm > bla.img >> | [gt68xx] sane_open: power control failure: check power plug! >> | scanimage: open of device gt68xx:libusb:004:006 failed: Error during >> device I/O >> >> One must know: The plustek optic slim 1200 is powrered by USB >> only. There is no possibillity to plug in a power adapter... >> >> So I asked google and got a hint to "GT68XX_FLAG_NO_POWER_STATUS". >> >> I found it in sane-backends-1.0.23/backend/gt68xx_low.h: >> >> #define GT68XX_FLAG_NO_POWER_STATUS (1 << 7) /* >> get_power_status_doesn't work */ >> >> I am not familiar with the use of such flags, but for my >> understanding, actually this flag should be set. At least, one bit in >> it is set (and, despite of that, I get the power plug error). >> >> I set >> >> #define GT68XX_FLAG_NO_POWER_STATUS (0 << 7) >> >> and recompiled sane, but no change. >> >> Additionally, I erased all appearances of >> "GT68XX_FLAG_NO_POWER_STATUS" in gt68xx_devices.c and gt68xx_gt6816.c, >> and recompiled it again, but no change. >> >> >> So my stupid question is: How I have to change the sources to >> get this scanner working? >> >> >> kind regards, >> >> N. >> > > Hello, > > you don't need to change the meaning of the flag. You have to add it to > the description matching your scanner in the devices description in > gt68xx_devices.c . You can find the right by the vendor/product ids at the > end of the file.
Thank you for your hint. I finally got it working. In gt68xx_devices.c, struct "static GT68xx_Model plustek_opticslim1200_model", I exchanged the last entry "0" with "GT68XX_FLAG_NO_POWER_STATUS". This is line 1752 in v-1.0.23. In words of diff: diff gt68xx_devices.c_bak gt68xx_devices.c 1752c1752 < 0 --- > GT68XX_FLAG_NO_POWER_STATUS After recompiling, the scanner is working now as expected. That's all. Of course, this small change should inserted into the sources. Can do this someone for me? Otherwise, I would have to create a bug tracker account only for this small issue, if I understood it correctly. regards, N.
